diff --git a/.gitignore b/.gitignore
index 5419ca42..eb6a49fa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,7 @@ __pycache__
 !/.idea/cmake.xml
 
 generators/*.db
+
+# Clangd LSP
+/compile_commands.json
+/.cache
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19159f5c..054a5788 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,17 @@ will consitute of a breaking change warranting a new major release:
   not sufficient for cases where 3 writers write concurrently.
 - Fixed state issue for PTME writer object where the writer was not reset properly after a timeout
   of a partial transfer. This was a major bug blocking the whole VC if it occured.
+- STR config path was previously hardcoded to `/mnt/sd0/startracker/flight-config.json`.
+  A new abstraction was introduces which now uses the active SD card to build the correct
+  config path when initializing the star tracker.
+
+## Added
+
+- Added new PUS 15 subservice `DELETE_BY_TIME_RANGE` which allows to also specify a deletion
+  start time when deleting packets from the persistent TM store.
+- Introduced a new `RELOAD_JSON_CFG_FILE` command for the STR to reload the JSON configuration
+  data based on the current output of the config file path getter function. A reboot of the
+  device is still necessary to load the configuration to the STR.
 
 # [v7.3.0] 2023-11-07
 
@@ -703,7 +714,7 @@ This is the version which will fly on the satellite for the initial launch phase
   This gives other tasks some time to register the SD cards being unusable, and therefore provides
   a way for them to perform any re-initialization tasks necessary after SD card switches.
 - TCS controller now only has an OFF mode and an ON mode
-- The TCS controller pauses operations related to the TCS board assembly (reading sensors and 
+- The TCS controller pauses operations related to the TCS board assembly (reading sensors and
   the primary control loop) while a TCS board recovery is on-going.
 - Allow specifying custom OBSW update filename. This allowed keeping a cleaner file structure
   where each update has a name including the version
@@ -1768,8 +1779,8 @@ Syrlinks PR: PR: https://egit.irs.uni-stuttgart.de/eive/eive-obsw/pulls/353
 - Syrlinks Handler: Read RX frequency shift as 24 bit signed number now. Also include
   validity handling for datasets.
   PR: https://egit.irs.uni-stuttgart.de/eive/eive-obsw/pulls/350
-- `GyroADIS1650XHandler`: Changed calculation of angular rate to be sensitivity based instead of 
-  max. range based, as previous fix still left an margin of error between ADIS16505 sensors 
+- `GyroADIS1650XHandler`: Changed calculation of angular rate to be sensitivity based instead of
+  max. range based, as previous fix still left an margin of error between ADIS16505 sensors
   and L3GD20 sensors.
   PR: https://egit.irs.uni-stuttgart.de/eive/eive-obsw/pulls/346
 
diff --git a/bsp_q7s/CMakeLists.txt b/bsp_q7s/CMakeLists.txt
index e3232363..0a1a9434 100644
--- a/bsp_q7s/CMakeLists.txt
+++ b/bsp_q7s/CMakeLists.txt
@@ -25,3 +25,4 @@ add_subdirectory(memory)
 add_subdirectory(callbacks)
 add_subdirectory(xadc)
 add_subdirectory(fs)
+add_subdirectory(acs)
diff --git a/bsp_q7s/acs/CMakeLists.txt b/bsp_q7s/acs/CMakeLists.txt
new file mode 100644
index 00000000..87bf46f2
--- /dev/null
+++ b/bsp_q7s/acs/CMakeLists.txt
@@ -0,0 +1 @@
+# target_sources(${OBSW_NAME} PUBLIC <Source File List>)
diff --git a/bsp_q7s/acs/StrConfigPathGetter.h b/bsp_q7s/acs/StrConfigPathGetter.h
new file mode 100644
index 00000000..58d6964c
--- /dev/null
+++ b/bsp_q7s/acs/StrConfigPathGetter.h
@@ -0,0 +1,23 @@
+#include <optional>
+
+#include "bsp_q7s/fs/SdCardManager.h"
+#include "mission/acs/str/strHelpers.h"
+
+class StrConfigPathGetter : public startracker::SdCardConfigPathGetter {
+ public:
+  StrConfigPathGetter(SdCardManager& sdcMan) : sdcMan(sdcMan) {}
+
+  std::optional<std::string> getCfgPath() override {
+    if (!sdcMan.isSdCardUsable(std::nullopt)) {
+      return std::nullopt;
+    }
+    if (sdcMan.getActiveSdCard() == sd::SdCard::SLOT_1) {
+      return std::string("/mnt/sd1/startracker/flight-config.json");
+    } else {
+      return std::string("/mnt/sd0/startracker/flight-config.json");
+    }
+  }
+
+ private:
+  SdCardManager& sdcMan;
+};
diff --git a/bsp_q7s/em/emObjectFactory.cpp b/bsp_q7s/em/emObjectFactory.cpp
index 41dab3e6..65456d1e 100644
--- a/bsp_q7s/em/emObjectFactory.cpp
+++ b/bsp_q7s/em/emObjectFactory.cpp
@@ -152,7 +152,7 @@ void ObjectFactory::produce(void* args) {
 #endif
 
 #if OBSW_ADD_STAR_TRACKER == 1
-  createStrComponents(pwrSwitcher);
+  createStrComponents(pwrSwitcher, *SdCardManager::instance());
 #endif /* OBSW_ADD_STAR_TRACKER == 1 */
 
 #if OBSW_ADD_PL_PCDU == 1
diff --git a/bsp_q7s/fmObjectFactory.cpp b/bsp_q7s/fmObjectFactory.cpp
index b154ac52..05704abf 100644
--- a/bsp_q7s/fmObjectFactory.cpp
+++ b/bsp_q7s/fmObjectFactory.cpp
@@ -109,7 +109,7 @@ void ObjectFactory::produce(void* args) {
   createPayloadComponents(gpioComIF, *pwrSwitcher);
 
 #if OBSW_ADD_STAR_TRACKER == 1
-  createStrComponents(pwrSwitcher);
+  createStrComponents(pwrSwitcher, *SdCardManager::instance());
 #endif /* OBSW_ADD_STAR_TRACKER == 1 */
 
 #if OBSW_ADD_CCSDS_IP_CORES == 1
diff --git a/bsp_q7s/objectFactory.cpp b/bsp_q7s/objectFactory.cpp
index eadf70c6..f561e0f5 100644
--- a/bsp_q7s/objectFactory.cpp
+++ b/bsp_q7s/objectFactory.cpp
@@ -37,6 +37,7 @@
 #include <cstring>
 
 #include "OBSWConfig.h"
+#include "bsp_q7s/acs/StrConfigPathGetter.h"
 #include "bsp_q7s/boardtest/Q7STestTask.h"
 #include "bsp_q7s/callbacks/gnssCallback.h"
 #include "bsp_q7s/callbacks/pcduSwitchCb.h"
@@ -935,7 +936,7 @@ void ObjectFactory::createTestComponents(LinuxLibgpioIF* gpioComIF) {
 #endif
 }
 
-void ObjectFactory::createStrComponents(PowerSwitchIF* pwrSwitcher) {
+void ObjectFactory::createStrComponents(PowerSwitchIF* pwrSwitcher, SdCardManager& sdcMan) {
   auto* strAssy = new StrAssembly(objects::STR_ASSY);
   strAssy->connectModeTreeParent(satsystem::acs::ACS_SUBSYSTEM);
   auto* starTrackerCookie =
@@ -949,9 +950,10 @@ void ObjectFactory::createStrComponents(PowerSwitchIF* pwrSwitcher) {
     sif::error << "No valid Star Tracker parameter JSON file" << std::endl;
   }
   auto strFdir = new StrFdir(objects::STAR_TRACKER);
+  auto cfgGetter = new StrConfigPathGetter(sdcMan);
   auto starTracker =
       new StarTrackerHandler(objects::STAR_TRACKER, objects::STR_COM_IF, starTrackerCookie,
-                             paramJsonFile, strComIF, power::PDU1_CH2_STAR_TRACKER_5V);
+                             strComIF, power::PDU1_CH2_STAR_TRACKER_5V, *cfgGetter);
   starTracker->setPowerSwitcher(pwrSwitcher);
   starTracker->connectModeTreeParent(*strAssy);
   starTracker->setCustomFdir(strFdir);
diff --git a/bsp_q7s/objectFactory.h b/bsp_q7s/objectFactory.h
index b3dfa83b..2e10dd71 100644
--- a/bsp_q7s/objectFactory.h
+++ b/bsp_q7s/objectFactory.h
@@ -15,6 +15,8 @@
 #include <atomic>
 #include <string>
 
+#include "bsp_q7s/fs/SdCardManager.h"
+
 class LinuxLibgpioIF;
 class SerialComIF;
 class SpiComIF;
@@ -75,7 +77,7 @@ void createHeaterComponents(GpioIF* gpioIF, PowerSwitchIF* pwrSwitcher, HealthTa
                             HeaterHandler*& heaterHandler);
 void createImtqComponents(PowerSwitchIF* pwrSwitcher, bool enableHkSets, const char* i2cDev);
 void createBpxBatteryComponent(bool enableHkSets, const char* i2cDev);
-void createStrComponents(PowerSwitchIF* pwrSwitcher);
+void createStrComponents(PowerSwitchIF* pwrSwitcher, SdCardManager& sdcMan);
 void createSolarArrayDeploymentComponents(PowerSwitchIF& pwrSwitcher, GpioIF& gpioIF);
 void createSyrlinksComponents(PowerSwitchIF* pwrSwitcher);
 void createPayloadComponents(LinuxLibgpioIF* gpioComIF, PowerSwitchIF& pwrSwitcher);
diff --git a/fsfw b/fsfw
index cc3e64e7..41d67bff 160000
--- a/fsfw
+++ b/fsfw
@@ -1 +1 @@
-Subproject commit cc3e64e70d90f6a2b5c59215b2569c1771e890f0
+Subproject commit 41d67bff639192afa2e18a23db6801c75b4fea88
diff --git a/mission/acs/str/ArcsecJsonParamBase.cpp b/mission/acs/str/ArcsecJsonParamBase.cpp
index 58c54d30..704c23af 100644
--- a/mission/acs/str/ArcsecJsonParamBase.cpp
+++ b/mission/acs/str/ArcsecJsonParamBase.cpp
@@ -65,7 +65,7 @@ void ArcsecJsonParamBase::addSetParamHeader(uint8_t* buffer, uint8_t setId) {
   *(buffer + 1) = setId;
 }
 
-ReturnValue_t ArcsecJsonParamBase::init(const std::string filename) {
+ReturnValue_t ArcsecJsonParamBase::init(const std::string& filename) {
   ReturnValue_t result = returnvalue::OK;
   if (not std::filesystem::exists(filename)) {
     sif::warning << "ArcsecJsonParamBase::init: JSON file " << filename << " does not exist"
diff --git a/mission/acs/str/ArcsecJsonParamBase.h b/mission/acs/str/ArcsecJsonParamBase.h
index 4c4a7a90..b855a322 100644
--- a/mission/acs/str/ArcsecJsonParamBase.h
+++ b/mission/acs/str/ArcsecJsonParamBase.h
@@ -46,7 +46,7 @@ class ArcsecJsonParamBase {
    * @param return    JSON_FILE_NOT_EXISTS if specified file does not exist, otherwise
    *                  returnvalue::OK
    */
-  ReturnValue_t init(const std::string filename);
+  ReturnValue_t init(const std::string& filename);
 
   /**
    * @brief   Fills a buffer with a parameter set
diff --git a/mission/acs/str/StarTrackerHandler.cpp b/mission/acs/str/StarTrackerHandler.cpp
index 541301f1..9ad70d41 100644
--- a/mission/acs/str/StarTrackerHandler.cpp
+++ b/mission/acs/str/StarTrackerHandler.cpp
@@ -5,6 +5,8 @@
 #include <mission/acs/str/strHelpers.h>
 #include <mission/acs/str/strJsonCommands.h>
 
+#include "fsfw/ipc/MessageQueueIF.h"
+
 extern "C" {
 #include <sagitta/client/actionreq.h>
 #include <sagitta/client/client_tm_structs.h>
@@ -24,8 +26,8 @@ extern "C" {
 std::atomic_bool JCFG_DONE(false);
 
 StarTrackerHandler::StarTrackerHandler(object_id_t objectId, object_id_t comIF, CookieIF* comCookie,
-                                       const char* jsonFileStr, StrComHandler* strHelper,
-                                       power::Switch_t powerSwitch)
+                                       StrComHandler* strHelper, power::Switch_t powerSwitch,
+                                       startracker::SdCardConfigPathGetter& cfgPathGetter)
     : DeviceHandlerBase(objectId, comIF, comCookie),
       temperatureSet(this),
       versionSet(this),
@@ -57,8 +59,8 @@ StarTrackerHandler::StarTrackerHandler(object_id_t objectId, object_id_t comIF,
       centroidsSet(this),
       contrastSet(this),
       strHelper(strHelper),
-      paramJsonFile(jsonFileStr),
-      powerSwitch(powerSwitch) {
+      powerSwitch(powerSwitch),
+      cfgPathGetter(cfgPathGetter) {
   if (comCookie == nullptr) {
     sif::error << "StarTrackerHandler: Invalid com cookie" << std::endl;
   }
@@ -82,17 +84,12 @@ void StarTrackerHandler::doStartUp() {
       // the device handler's submode to the star tracker's mode
       return;
     case StartupState::DONE:
-      if (jcfgCountdown.isBusy()) {
+      if (!JCFG_DONE) {
         startupState = StartupState::WAIT_JCFG;
         return;
       }
-      startupState = StartupState::IDLE;
       break;
     case StartupState::WAIT_JCFG: {
-      if (jcfgCountdown.hasTimedOut()) {
-        startupState = StartupState::IDLE;
-        break;
-      }
       return;
     }
     default:
@@ -139,8 +136,7 @@ ReturnValue_t StarTrackerHandler::initialize() {
 
   // Spin up a thread to do the JSON initialization, takes 200-250 ms which would
   // delay whole satellite boot process.
-  jcfgCountdown.resetTimer();
-  jsonCfgTask = std::thread{setUpJsonCfgs, std::ref(jcfgs), paramJsonFile.c_str()};
+  reloadJsonCfgFile();
 
   EventManagerIF* manager = ObjectManager::instance()->get<EventManagerIF>(objects::EVENT_MANAGER);
   if (manager == nullptr) {
@@ -169,6 +165,20 @@ ReturnValue_t StarTrackerHandler::initialize() {
   return returnvalue::OK;
 }
 
+bool StarTrackerHandler::reloadJsonCfgFile() {
+  jcfgCountdown.resetTimer();
+  auto strCfgPath = cfgPathGetter.getCfgPath();
+  if (strCfgPath.has_value()) {
+    jcfgPending = true;
+    JCFG_DONE = false;
+    jsonCfgTask = std::thread{setUpJsonCfgs, std::ref(jcfgs), strCfgPath.value()};
+    return true;
+  }
+  // Simplified FDIR: Just continue as usual..
+  JCFG_DONE = true;
+  return false;
+}
+
 ReturnValue_t StarTrackerHandler::executeAction(ActionId_t actionId, MessageQueueId_t commandedBy,
                                                 const uint8_t* data, size_t size) {
   ReturnValue_t result = returnvalue::OK;
@@ -335,6 +345,24 @@ void StarTrackerHandler::performOperationHook() {
         break;
     }
   }
+  if (jcfgPending) {
+    if (JCFG_DONE) {
+      if(startupState == StartupState::WAIT_JCFG) {
+        startupState = StartupState::DONE;
+      }
+      jsonCfgTask.join();
+      jcfgPending = false;
+      auto iter = deviceCommandMap.find(startracker::RELOAD_JSON_CFG_FILE);
+      if (iter != deviceCommandMap.end() and iter->second.sendReplyTo != MessageQueueIF::NO_QUEUE) {
+        actionHelper.finish(true, iter->second.sendReplyTo, startracker::RELOAD_JSON_CFG_FILE);
+      }
+    } else if (jcfgCountdown.hasTimedOut()) {
+      auto iter = deviceCommandMap.find(startracker::RELOAD_JSON_CFG_FILE);
+      if (iter != deviceCommandMap.end() and iter->second.sendReplyTo != MessageQueueIF::NO_QUEUE) {
+        actionHelper.finish(false, iter->second.sendReplyTo, startracker::RELOAD_JSON_CFG_FILE);
+      }
+    }
+  }
 }
 
 Submode_t StarTrackerHandler::getInitialSubmode() { return startracker::SUBMODE_BOOTLOADER; }
@@ -499,6 +527,16 @@ ReturnValue_t StarTrackerHandler::buildCommandFromCommand(DeviceCommandId_t devi
       preparePingRequest();
       return returnvalue::OK;
     }
+    case (startracker::RELOAD_JSON_CFG_FILE): {
+      if (jcfgPending) {
+        return HasActionsIF::IS_BUSY;
+      }
+      // It should be noted that this just reloads the JSON config structure in memory from the
+      // JSON file. The configuration still needs to be sent to the STR. The easiest way to achieve
+      // this is to simply reboot the device after a reload.
+      reloadJsonCfgFile();
+      return returnvalue::OK;
+    }
     case (startracker::SET_TIME_FROM_SYS_TIME): {
       SetTimeActionRequest setTimeRequest{};
       timeval tv;
@@ -513,6 +551,7 @@ ReturnValue_t StarTrackerHandler::buildCommandFromCommand(DeviceCommandId_t devi
       rawPacket = commandBuffer;
       return returnvalue::OK;
     }
+
     case (startracker::REQ_TIME): {
       prepareTimeRequest();
       return returnvalue::OK;
@@ -726,6 +765,7 @@ void StarTrackerHandler::fillCommandAndReplyMap() {
                                    startracker::MAX_FRAME_SIZE * 2 + 2);
   this->insertInCommandMap(startracker::UPLOAD_IMAGE);
   this->insertInCommandMap(startracker::DOWNLOAD_IMAGE);
+  this->insertInCommandMap(startracker::RELOAD_JSON_CFG_FILE);
   this->insertInCommandAndReplyMap(startracker::REQ_POWER, 3, &powerSet,
                                    startracker::MAX_FRAME_SIZE * 2 + 2);
   this->insertInCommandAndReplyMap(startracker::REQ_INTERFACE, 3, &interfaceSet,
@@ -928,7 +968,7 @@ void StarTrackerHandler::bootFirmware(Mode_t toMode) {
   }
 }
 
-void StarTrackerHandler::setUpJsonCfgs(JsonConfigs& cfgs, const char* paramJsonFile) {
+void StarTrackerHandler::setUpJsonCfgs(JsonConfigs& cfgs, std::string paramJsonFile) {
   cfgs.tracking.init(paramJsonFile);
   cfgs.logLevel.init(paramJsonFile);
   cfgs.logSubscription.init(paramJsonFile);
@@ -2811,3 +2851,5 @@ ReturnValue_t StarTrackerHandler::checkCommand(ActionId_t actionId) {
   }
   return returnvalue::OK;
 }
+
+ReturnValue_t StarTrackerHandler::acceptExternalDeviceCommands() { return returnvalue::OK; }
diff --git a/mission/acs/str/StarTrackerHandler.h b/mission/acs/str/StarTrackerHandler.h
index 3bfdc8fd..6bc1ff09 100644
--- a/mission/acs/str/StarTrackerHandler.h
+++ b/mission/acs/str/StarTrackerHandler.h
@@ -27,7 +27,9 @@ extern "C" {
  * @details Datasheet: https://eive-cloud.irs.uni-stuttgart.de/index.php/apps/files/?dir=/EIVE_IRS/
  *                     Arbeitsdaten/08_Used%20Components/ArcSec_KULeuven_Startracker/
  *                     Sagitta%201.0%20Datapack&fileid=659181
- * @author	J. Meier
+ * @note The STR code is a chaotic inconsistent mess and should be re-written with a simpler base
+ *       class. DO NOT USE THIS AS REFERENCE. Stay away from it.
+ * @author	J. Meier, R. Mueller
  */
 class StarTrackerHandler : public DeviceHandlerBase {
  public:
@@ -42,8 +44,8 @@ class StarTrackerHandler : public DeviceHandlerBase {
    * 						to high to enable the device.
    */
   StarTrackerHandler(object_id_t objectId, object_id_t comIF, CookieIF* comCookie,
-                     const char* jsonFileStr, StrComHandler* strHelper,
-                     power::Switch_t powerSwitch);
+                     StrComHandler* strHelper, power::Switch_t powerSwitch,
+                     startracker::SdCardConfigPathGetter& cfgPathGetter);
   virtual ~StarTrackerHandler();
 
   ReturnValue_t initialize() override;
@@ -240,11 +242,12 @@ class StarTrackerHandler : public DeviceHandlerBase {
     Subscription subscription;
     AutoThreshold autoThreshold;
   };
+  bool jcfgPending = false;
   JsonConfigs jcfgs;
-  Countdown jcfgCountdown = Countdown(250);
+  Countdown jcfgCountdown = Countdown(1000);
   bool commandExecuted = false;
   std::thread jsonCfgTask;
-  static void setUpJsonCfgs(JsonConfigs& cfgs, const char* paramJsonFile);
+  static void setUpJsonCfgs(JsonConfigs& cfgs, std::string paramJsonFile);
 
   std::string paramJsonFile;
 
@@ -311,6 +314,8 @@ class StarTrackerHandler : public DeviceHandlerBase {
   std::set<DeviceCommandId_t> additionalRequestedTm{};
   std::set<DeviceCommandId_t>::iterator currentSecondaryTmIter;
 
+  startracker::SdCardConfigPathGetter& cfgPathGetter;
+
   /**
    * @brief   Handles internal state
    */
@@ -542,6 +547,8 @@ class StarTrackerHandler : public DeviceHandlerBase {
   void doNormalTransition(Mode_t modeFrom, Submode_t subModeFrom);
   void bootFirmware(Mode_t toMode);
   void bootBootloader();
+  bool reloadJsonCfgFile();
+  ReturnValue_t acceptExternalDeviceCommands() override;
 };
 
 #endif /* MISSION_DEVICES_STARTRACKERHANDLER_H_ */
diff --git a/mission/acs/str/strHelpers.h b/mission/acs/str/strHelpers.h
index 808d6060..8f83331d 100644
--- a/mission/acs/str/strHelpers.h
+++ b/mission/acs/str/strHelpers.h
@@ -14,6 +14,12 @@ namespace startracker {
 static const Submode_t SUBMODE_BOOTLOADER = 1;
 static const Submode_t SUBMODE_FIRMWARE = 2;
 
+class SdCardConfigPathGetter {
+ public:
+  virtual ~SdCardConfigPathGetter() = default;
+  virtual std::optional<std::string> getCfgPath() = 0;
+};
+
 /**
  * @brief    Returns the frame type field of a decoded frame.
  */
@@ -381,6 +387,7 @@ static constexpr DeviceCommandId_t REQ_CENTROIDS = 94;
 static constexpr DeviceCommandId_t ADD_SECONDARY_TM_TO_NORMAL_MODE = 95;
 static constexpr DeviceCommandId_t RESET_SECONDARY_TM_SET = 96;
 static constexpr DeviceCommandId_t READ_SECONDARY_TM_SET = 97;
+static constexpr DeviceCommandId_t RELOAD_JSON_CFG_FILE = 100;
 static const DeviceCommandId_t NONE = 0xFFFFFFFF;
 
 static const uint32_t VERSION_SET_ID = REQ_VERSION;
diff --git a/mission/tmtc/PersistentTmStore.cpp b/mission/tmtc/PersistentTmStore.cpp
index 160348cd..0ba690c2 100644
--- a/mission/tmtc/PersistentTmStore.cpp
+++ b/mission/tmtc/PersistentTmStore.cpp
@@ -137,40 +137,68 @@ ReturnValue_t PersistentTmStore::handleCommandQueue(StorageManagerIF& ipcStore,
   if (cmdMessage.getMessageType() == messagetypes::TM_STORE) {
     Command_t cmd = cmdMessage.getCommand();
     if (cmd == TmStoreMessage::DELETE_STORE_CONTENT_TIME) {
-      Clock::getClock_timeval(&currentTv);
-      store_address_t storeId = TmStoreMessage::getStoreId(&cmdMessage);
-      auto accessor = ipcStore.getData(storeId);
-      uint32_t deleteUpToUnixSeconds = 0;
-      size_t size = accessor.second.size();
-      SerializeAdapter::deSerialize(&deleteUpToUnixSeconds, accessor.second.data(), &size,
-                                    SerializeIF::Endianness::NETWORK);
+      result = handleDeletionCmd(ipcStore, cmdMessage);
       execCmd = cmd;
-      deleteUpTo(deleteUpToUnixSeconds);
     } else if (cmd == TmStoreMessage::DOWNLINK_STORE_CONTENT_TIME) {
-      Clock::getClock_timeval(&currentTv);
-      store_address_t storeId = TmStoreMessage::getStoreId(&cmdMessage);
-      auto accessor = ipcStore.getData(storeId);
-      if (accessor.second.size() < 8) {
-        return returnvalue::FAILED;
-      }
-      uint32_t dumpFromUnixSeconds = 0;
-      uint32_t dumpUntilUnixSeconds = 0;
-      size_t size = 8;
-      SerializeAdapter::deSerialize(&dumpFromUnixSeconds, accessor.second.data(), &size,
-                                    SerializeIF::Endianness::NETWORK);
-      SerializeAdapter::deSerialize(&dumpUntilUnixSeconds, accessor.second.data() + 4, &size,
-                                    SerializeIF::Endianness::NETWORK);
-      result = startDumpFromUpTo(dumpFromUnixSeconds, dumpUntilUnixSeconds);
-      if (result == BUSY_DUMPING) {
-        triggerEvent(persTmStore::BUSY_DUMPING_EVENT);
-        return result;
-      }
+      result = handleDumpCmd(ipcStore, cmdMessage);
       execCmd = cmd;
     }
   }
   return result;
 }
 
+ReturnValue_t PersistentTmStore::handleDeletionCmd(StorageManagerIF& ipcStore,
+                                                   CommandMessage& cmdMessage) {
+  Clock::getClock_timeval(&currentTv);
+  store_address_t storeId = TmStoreMessage::getStoreId(&cmdMessage);
+  auto accessor = ipcStore.getData(storeId);
+  size_t size = accessor.second.size();
+  if (size < 4) {
+    return returnvalue::FAILED;
+  }
+  const uint8_t* data = accessor.second.data();
+  uint32_t deleteUpToUnixSeconds = 0;
+  if (size == 4) {
+    SerializeAdapter::deSerialize(&deleteUpToUnixSeconds, &data, &size,
+                                  SerializeIF::Endianness::NETWORK);
+    deleteUpTo(deleteUpToUnixSeconds);
+  } else if (size == 8) {
+    uint32_t deleteFromUnixSeconds = 0;
+    SerializeAdapter::deSerialize(&deleteFromUnixSeconds, &data, &size,
+                                  SerializeIF::Endianness::NETWORK);
+    SerializeAdapter::deSerialize(&deleteUpToUnixSeconds, &data, &size,
+                                  SerializeIF::Endianness::NETWORK);
+    deleteFromUpTo(deleteFromUnixSeconds, deleteUpToUnixSeconds);
+  } else {
+    sif::warning << "PersistentTmStore: Unknown deletion time specification" << std::endl;
+    return returnvalue::FAILED;
+  }
+  return returnvalue::OK;
+}
+
+ReturnValue_t PersistentTmStore::handleDumpCmd(StorageManagerIF& ipcStore,
+                                               CommandMessage& cmdMessage) {
+  Clock::getClock_timeval(&currentTv);
+  store_address_t storeId = TmStoreMessage::getStoreId(&cmdMessage);
+  auto accessor = ipcStore.getData(storeId);
+  if (accessor.second.size() < 8) {
+    return returnvalue::FAILED;
+  }
+  uint32_t dumpFromUnixSeconds = 0;
+  uint32_t dumpUntilUnixSeconds = 0;
+  size_t size = 8;
+  SerializeAdapter::deSerialize(&dumpFromUnixSeconds, accessor.second.data(), &size,
+                                SerializeIF::Endianness::NETWORK);
+  SerializeAdapter::deSerialize(&dumpUntilUnixSeconds, accessor.second.data() + 4, &size,
+                                SerializeIF::Endianness::NETWORK);
+  ReturnValue_t result = startDumpFromUpTo(dumpFromUnixSeconds, dumpUntilUnixSeconds);
+  if (result == BUSY_DUMPING) {
+    triggerEvent(persTmStore::BUSY_DUMPING_EVENT);
+    return result;
+  }
+  return returnvalue::OK;
+}
+
 ReturnValue_t PersistentTmStore::startDumpFrom(uint32_t fromUnixSeconds) {
   return startDumpFromUpTo(fromUnixSeconds, currentTv.tv_sec);
 }
@@ -257,7 +285,9 @@ bool PersistentTmStore::updateBaseDir() {
   return true;
 }
 
-void PersistentTmStore::deleteUpTo(uint32_t unixSeconds) {
+void PersistentTmStore::deleteUpTo(uint32_t unixSeconds) { deleteFromUpTo(0, unixSeconds); }
+
+void PersistentTmStore::deleteFromUpTo(uint32_t startUnixTime, uint32_t endUnixTime) {
   using namespace std::filesystem;
   for (auto const& file : directory_iterator(basePath)) {
     if (file.is_directory() or (activeFile.has_value() and (activeFile.value() == file.path()))) {
@@ -270,7 +300,8 @@ void PersistentTmStore::deleteUpTo(uint32_t unixSeconds) {
       continue;
     }
     time_t fileEpoch = timegm(&fileTime);
-    if (fileEpoch + rolloverDiffSeconds < unixSeconds) {
+    if (fileEpoch + rolloverDiffSeconds < endUnixTime and
+        static_cast<uint32_t>(fileEpoch) >= startUnixTime) {
       std::error_code e;
       std::filesystem::remove(file.path(), e);
     }
diff --git a/mission/tmtc/PersistentTmStore.h b/mission/tmtc/PersistentTmStore.h
index e86acaaf..ccd6cbe6 100644
--- a/mission/tmtc/PersistentTmStore.h
+++ b/mission/tmtc/PersistentTmStore.h
@@ -14,6 +14,7 @@
 
 #include "eive/eventSubsystemIds.h"
 #include "eive/resultClassIds.h"
+#include "fsfw/ipc/CommandMessage.h"
 
 enum class RolloverInterval { MINUTELY, HOURLY, DAILY };
 
@@ -60,6 +61,7 @@ class PersistentTmStore : public TmStoreFrontendSimpleIF, public SystemObject {
   ReturnValue_t handleCommandQueue(StorageManagerIF& ipcStore, Command_t& execCmd);
 
   void deleteUpTo(uint32_t unixSeconds);
+  void deleteFromUpTo(uint32_t startUnixTime, uint32_t endUnixTime);
   ReturnValue_t startDumpFrom(uint32_t fromUnixSeconds);
   ReturnValue_t startDumpFromUpTo(uint32_t fromUnixSeconds, uint32_t upToUnixSeconds);
   /**
@@ -145,6 +147,8 @@ class PersistentTmStore : public TmStoreFrontendSimpleIF, public SystemObject {
   std::optional<uint8_t> extractSuffix(const std::string& pathStr);
   bool updateBaseDir();
   ReturnValue_t assignAndOrCreateMostRecentFile();
+  ReturnValue_t handleDeletionCmd(StorageManagerIF& ipcStore, CommandMessage& cmdMessage);
+  ReturnValue_t handleDumpCmd(StorageManagerIF& ipcStore, CommandMessage& cmdMessage);
 };
 
 #endif /* MISSION_TMTC_TMSTOREBACKEND_H_ */
diff --git a/mission/tmtc/Service15TmStorage.cpp b/mission/tmtc/Service15TmStorage.cpp
index 1c9b8611..efc9f2a6 100644
--- a/mission/tmtc/Service15TmStorage.cpp
+++ b/mission/tmtc/Service15TmStorage.cpp
@@ -16,8 +16,9 @@ Service15TmStorage::Service15TmStorage(object_id_t objectId, uint16_t apid,
 
 ReturnValue_t Service15TmStorage::isValidSubservice(uint8_t subservice) {
   switch (subservice) {
-    case (Subservices::DELETE_UP_TO):
-    case (Subservices::START_BY_TIME_RANGE_RETRIEVAL): {
+    case (Subservice::DELETE_UP_TO):
+    case (Subservice::DELETE_BY_TIME_RANGE):
+    case (Subservice::START_BY_TIME_RANGE_RETRIEVAL): {
       return OK;
     }
     default: {
@@ -45,34 +46,55 @@ ReturnValue_t Service15TmStorage::getMessageQueueAndObject(uint8_t subservice,
 ReturnValue_t Service15TmStorage::prepareCommand(CommandMessage *message, uint8_t subservice,
                                                  const uint8_t *tcData, size_t tcDataLen,
                                                  uint32_t *state, object_id_t objectId) {
-  if (subservice == Subservices::START_BY_TIME_RANGE_RETRIEVAL) {
-    // TODO: Hardcoded to UNIX timestamps.. Should allow arbitrary timestamp and let receiver
-    //       to time reading and reply handling
-    if (tcDataLen != 12) {
-      return INVALID_TC;
+  switch (subservice) {
+    case (Subservice::START_BY_TIME_RANGE_RETRIEVAL): {
+      // TODO: Hardcoded to UNIX timestamps.. Should allow arbitrary timestamp and let receiver
+      //       to time reading and reply handling
+      if (tcDataLen != 12) {
+        return INVALID_TC;
+      }
+      store_address_t storeId;
+      ReturnValue_t result = ipcStore->addData(&storeId, tcData + 4, tcDataLen - 4);
+      if (result != OK) {
+        return result;
+      }
+      // Store timestamps
+      TmStoreMessage::setDownlinkContentTimeMessage(message, storeId);
+      return CommandingServiceBase::EXECUTION_COMPLETE;
     }
-    store_address_t storeId;
-    ReturnValue_t result = ipcStore->addData(&storeId, tcData + 4, tcDataLen - 4);
-    if (result != OK) {
-      return result;
+    case (Subservice::DELETE_UP_TO): {
+      // TODO: Hardcoded to UNIX timestamps.. Should allow arbitrary timestamp and let receiver
+      //       to time reading and reply handling
+      if (tcDataLen != 8) {
+        return INVALID_TC;
+      }
+      store_address_t storeId;
+      ReturnValue_t result = ipcStore->addData(&storeId, tcData + 4, tcDataLen - 4);
+      if (result != OK) {
+        return result;
+      }
+      // Store timestamps
+      TmStoreMessage::setDeleteContentTimeMessage(message, storeId);
+      return CommandingServiceBase::EXECUTION_COMPLETE;
     }
-    // Store timestamps
-    TmStoreMessage::setDownlinkContentTimeMessage(message, storeId);
-    return CommandingServiceBase::EXECUTION_COMPLETE;
-  } else if (subservice == Subservices::DELETE_UP_TO) {
-    // TODO: Hardcoded to UNIX timestamps.. Should allow arbitrary timestamp and let receiver
-    //       to time reading and reply handling
-    if (tcDataLen != 8) {
-      return INVALID_TC;
+    case (Subservice::DELETE_BY_TIME_RANGE): {
+      // TODO: Hardcoded two UNIX timestamps.. Should allow arbitrary timestamp and let receiver
+      //       to time reading and reply handling
+      if (tcDataLen != 12) {
+        return INVALID_TC;
+      }
+      store_address_t storeId;
+      ReturnValue_t result = ipcStore->addData(&storeId, tcData + 4, tcDataLen - 4);
+      if (result != OK) {
+        return result;
+      }
+      // Store timestamps
+      TmStoreMessage::setDeleteContentTimeMessage(message, storeId);
+      return CommandingServiceBase::EXECUTION_COMPLETE;
     }
-    store_address_t storeId;
-    ReturnValue_t result = ipcStore->addData(&storeId, tcData + 4, tcDataLen - 4);
-    if (result != OK) {
-      return result;
+    default: {
+      return CommandingServiceBase::INVALID_SUBSERVICE;
     }
-    // Store timestamps
-    TmStoreMessage::setDeleteContentTimeMessage(message, storeId);
-    return CommandingServiceBase::EXECUTION_COMPLETE;
   }
   return OK;
 }
diff --git a/mission/tmtc/Service15TmStorage.h b/mission/tmtc/Service15TmStorage.h
index 33be0634..6da381ee 100644
--- a/mission/tmtc/Service15TmStorage.h
+++ b/mission/tmtc/Service15TmStorage.h
@@ -5,7 +5,11 @@
 
 class Service15TmStorage : public CommandingServiceBase {
  public:
-  enum Subservices : uint8_t { START_BY_TIME_RANGE_RETRIEVAL = 9, DELETE_UP_TO = 11 };
+  enum Subservice : uint8_t {
+    START_BY_TIME_RANGE_RETRIEVAL = 9,
+    DELETE_UP_TO = 11,
+    DELETE_BY_TIME_RANGE = 128
+  };
   explicit Service15TmStorage(object_id_t objectId, uint16_t apid, uint8_t numParallelCommands,
                               uint16_t commandTimeoutSecs = 60, size_t queueDepth = 10);
 
diff --git a/tmtc b/tmtc
index 99c6c8bb..0a417a89 160000
--- a/tmtc
+++ b/tmtc
@@ -1 +1 @@
-Subproject commit 99c6c8bbd0d791d8b17720de481c6142091a54a4
+Subproject commit 0a417a89e9e7f0447d35c70950685df59bf5c062