diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a6ddc9d..3be10611 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,14 +20,16 @@ will consitute of a breaking change warranting a new major release:
 
 - Small SCEX fix: The temperatur check option was not passed
   on for commands with a user data size larger than 1.
-- ACS Controller strategy is now actually written to the dataset for detumbling
-- During detumble the fused rotation rate is now calculated
-- Detumbling is now exited when its exit value is undercut and not its entry value
+- SCEX: Properly check whether filesystem is usable for filesystem checks.
+- ACS Controller strategy is now actually written to the dataset for detumbling.
+- During detumble the fused rotation rate is now calculated.
+- Detumbling is now exited when its exit value is undercut and not its entry value.
 - `EiveSystem`: Add a small delay between triggering an event for FDIR reboots and sending the
   command to the core controller.
 
 ## Changed
 
+- SCEX: Only perform filesystem checks when not in OFF mode.
 - The `EiveSystem` now only sends reboot commands targetting the same image.
 - Added 200 ms delay between switching HPA/MPA/TX/X8 and DRO GPIP pin OFF.
 - PL PCDU ADC set is now automatically enabled for `NORMAL` mode transitions. It is automatically
@@ -37,6 +39,10 @@ will consitute of a breaking change warranting a new major release:
 
 - PL PCDU for EM build.
 
+## Added
+
+- SCEX: Add warning event if filesystem is unusable.
+
 # [v6.2.0] 2023-07-26
 
 - `eive-tmtc`: v5.3.1
diff --git a/bsp_hosted/fsfwconfig/events/translateEvents.cpp b/bsp_hosted/fsfwconfig/events/translateEvents.cpp
index 2899592d..3a53a4fb 100644
--- a/bsp_hosted/fsfwconfig/events/translateEvents.cpp
+++ b/bsp_hosted/fsfwconfig/events/translateEvents.cpp
@@ -1,7 +1,7 @@
 /**
- * @brief    Auto-generated event translation file. Contains 301 translations.
+ * @brief    Auto-generated event translation file. Contains 302 translations.
  * @details
- * Generated on: 2023-07-26 12:51:20
+ * Generated on: 2023-08-02 09:40:31
  */
 #include "translateEvents.h"
 
@@ -261,6 +261,7 @@ const char *TX_OFF_STRING = "TX_OFF";
 const char *MISSING_PACKET_STRING = "MISSING_PACKET";
 const char *EXPERIMENT_TIMEDOUT_STRING = "EXPERIMENT_TIMEDOUT";
 const char *MULTI_PACKET_COMMAND_DONE_STRING = "MULTI_PACKET_COMMAND_DONE";
+const char *FS_UNUSABLE_STRING = "FS_UNUSABLE";
 const char *SET_CONFIGFILEVALUE_FAILED_STRING = "SET_CONFIGFILEVALUE_FAILED";
 const char *GET_CONFIGFILEVALUE_FAILED_STRING = "GET_CONFIGFILEVALUE_FAILED";
 const char *INSERT_CONFIGFILEVALUE_FAILED_STRING = "INSERT_CONFIGFILEVALUE_FAILED";
@@ -821,6 +822,8 @@ const char *translateEvents(Event event) {
       return EXPERIMENT_TIMEDOUT_STRING;
     case (13802):
       return MULTI_PACKET_COMMAND_DONE_STRING;
+    case (13803):
+      return FS_UNUSABLE_STRING;
     case (13901):
       return SET_CONFIGFILEVALUE_FAILED_STRING;
     case (13902):
diff --git a/bsp_hosted/fsfwconfig/objects/translateObjects.cpp b/bsp_hosted/fsfwconfig/objects/translateObjects.cpp
index a0002c24..8a6f23a0 100644
--- a/bsp_hosted/fsfwconfig/objects/translateObjects.cpp
+++ b/bsp_hosted/fsfwconfig/objects/translateObjects.cpp
@@ -2,7 +2,7 @@
  * @brief  Auto-generated object translation file.
  * @details
  * Contains 171 translations.
- * Generated on: 2023-07-26 12:51:20
+ * Generated on: 2023-08-02 09:40:31
  */
 #include "translateObjects.h"
 
diff --git a/generators/bsp_hosted_events.csv b/generators/bsp_hosted_events.csv
index 0cb9ba70..1c6f646d 100644
--- a/generators/bsp_hosted_events.csv
+++ b/generators/bsp_hosted_events.csv
@@ -255,6 +255,7 @@ Event ID (dec); Event ID (hex); Name; Severity; Description; File Path
 13800;0x35e8;MISSING_PACKET;LOW;No description;mission/payload/scexHelpers.h
 13801;0x35e9;EXPERIMENT_TIMEDOUT;LOW;No description;mission/payload/scexHelpers.h
 13802;0x35ea;MULTI_PACKET_COMMAND_DONE;INFO;No description;mission/payload/scexHelpers.h
+13803;0x35eb;FS_UNUSABLE;LOW;No description;mission/payload/scexHelpers.h
 13901;0x364d;SET_CONFIGFILEVALUE_FAILED;MEDIUM;No description;mission/utility/GlobalConfigHandler.h
 13902;0x364e;GET_CONFIGFILEVALUE_FAILED;MEDIUM;No description;mission/utility/GlobalConfigHandler.h
 13903;0x364f;INSERT_CONFIGFILEVALUE_FAILED;MEDIUM;No description;mission/utility/GlobalConfigHandler.h
diff --git a/generators/bsp_q7s_events.csv b/generators/bsp_q7s_events.csv
index 0cb9ba70..1c6f646d 100644
--- a/generators/bsp_q7s_events.csv
+++ b/generators/bsp_q7s_events.csv
@@ -255,6 +255,7 @@ Event ID (dec); Event ID (hex); Name; Severity; Description; File Path
 13800;0x35e8;MISSING_PACKET;LOW;No description;mission/payload/scexHelpers.h
 13801;0x35e9;EXPERIMENT_TIMEDOUT;LOW;No description;mission/payload/scexHelpers.h
 13802;0x35ea;MULTI_PACKET_COMMAND_DONE;INFO;No description;mission/payload/scexHelpers.h
+13803;0x35eb;FS_UNUSABLE;LOW;No description;mission/payload/scexHelpers.h
 13901;0x364d;SET_CONFIGFILEVALUE_FAILED;MEDIUM;No description;mission/utility/GlobalConfigHandler.h
 13902;0x364e;GET_CONFIGFILEVALUE_FAILED;MEDIUM;No description;mission/utility/GlobalConfigHandler.h
 13903;0x364f;INSERT_CONFIGFILEVALUE_FAILED;MEDIUM;No description;mission/utility/GlobalConfigHandler.h
diff --git a/generators/events/translateEvents.cpp b/generators/events/translateEvents.cpp
index 2899592d..3a53a4fb 100644
--- a/generators/events/translateEvents.cpp
+++ b/generators/events/translateEvents.cpp
@@ -1,7 +1,7 @@
 /**
- * @brief    Auto-generated event translation file. Contains 301 translations.
+ * @brief    Auto-generated event translation file. Contains 302 translations.
  * @details
- * Generated on: 2023-07-26 12:51:20
+ * Generated on: 2023-08-02 09:40:31
  */
 #include "translateEvents.h"
 
@@ -261,6 +261,7 @@ const char *TX_OFF_STRING = "TX_OFF";
 const char *MISSING_PACKET_STRING = "MISSING_PACKET";
 const char *EXPERIMENT_TIMEDOUT_STRING = "EXPERIMENT_TIMEDOUT";
 const char *MULTI_PACKET_COMMAND_DONE_STRING = "MULTI_PACKET_COMMAND_DONE";
+const char *FS_UNUSABLE_STRING = "FS_UNUSABLE";
 const char *SET_CONFIGFILEVALUE_FAILED_STRING = "SET_CONFIGFILEVALUE_FAILED";
 const char *GET_CONFIGFILEVALUE_FAILED_STRING = "GET_CONFIGFILEVALUE_FAILED";
 const char *INSERT_CONFIGFILEVALUE_FAILED_STRING = "INSERT_CONFIGFILEVALUE_FAILED";
@@ -821,6 +822,8 @@ const char *translateEvents(Event event) {
       return EXPERIMENT_TIMEDOUT_STRING;
     case (13802):
       return MULTI_PACKET_COMMAND_DONE_STRING;
+    case (13803):
+      return FS_UNUSABLE_STRING;
     case (13901):
       return SET_CONFIGFILEVALUE_FAILED_STRING;
     case (13902):
diff --git a/generators/objects/translateObjects.cpp b/generators/objects/translateObjects.cpp
index fef8fb71..f4779490 100644
--- a/generators/objects/translateObjects.cpp
+++ b/generators/objects/translateObjects.cpp
@@ -2,7 +2,7 @@
  * @brief  Auto-generated object translation file.
  * @details
  * Contains 175 translations.
- * Generated on: 2023-07-26 12:51:20
+ * Generated on: 2023-08-02 09:40:31
  */
 #include "translateObjects.h"
 
diff --git a/linux/fsfwconfig/events/translateEvents.cpp b/linux/fsfwconfig/events/translateEvents.cpp
index 2899592d..3a53a4fb 100644
--- a/linux/fsfwconfig/events/translateEvents.cpp
+++ b/linux/fsfwconfig/events/translateEvents.cpp
@@ -1,7 +1,7 @@
 /**
- * @brief    Auto-generated event translation file. Contains 301 translations.
+ * @brief    Auto-generated event translation file. Contains 302 translations.
  * @details
- * Generated on: 2023-07-26 12:51:20
+ * Generated on: 2023-08-02 09:40:31
  */
 #include "translateEvents.h"
 
@@ -261,6 +261,7 @@ const char *TX_OFF_STRING = "TX_OFF";
 const char *MISSING_PACKET_STRING = "MISSING_PACKET";
 const char *EXPERIMENT_TIMEDOUT_STRING = "EXPERIMENT_TIMEDOUT";
 const char *MULTI_PACKET_COMMAND_DONE_STRING = "MULTI_PACKET_COMMAND_DONE";
+const char *FS_UNUSABLE_STRING = "FS_UNUSABLE";
 const char *SET_CONFIGFILEVALUE_FAILED_STRING = "SET_CONFIGFILEVALUE_FAILED";
 const char *GET_CONFIGFILEVALUE_FAILED_STRING = "GET_CONFIGFILEVALUE_FAILED";
 const char *INSERT_CONFIGFILEVALUE_FAILED_STRING = "INSERT_CONFIGFILEVALUE_FAILED";
@@ -821,6 +822,8 @@ const char *translateEvents(Event event) {
       return EXPERIMENT_TIMEDOUT_STRING;
     case (13802):
       return MULTI_PACKET_COMMAND_DONE_STRING;
+    case (13803):
+      return FS_UNUSABLE_STRING;
     case (13901):
       return SET_CONFIGFILEVALUE_FAILED_STRING;
     case (13902):
diff --git a/linux/fsfwconfig/objects/translateObjects.cpp b/linux/fsfwconfig/objects/translateObjects.cpp
index fef8fb71..f4779490 100644
--- a/linux/fsfwconfig/objects/translateObjects.cpp
+++ b/linux/fsfwconfig/objects/translateObjects.cpp
@@ -2,7 +2,7 @@
  * @brief  Auto-generated object translation file.
  * @details
  * Contains 175 translations.
- * Generated on: 2023-07-26 12:51:20
+ * Generated on: 2023-08-02 09:40:31
  */
 #include "translateObjects.h"
 
diff --git a/mission/payload/ScexDeviceHandler.cpp b/mission/payload/ScexDeviceHandler.cpp
index f44aa78b..12c62f7a 100644
--- a/mission/payload/ScexDeviceHandler.cpp
+++ b/mission/payload/ScexDeviceHandler.cpp
@@ -19,11 +19,16 @@ using namespace returnvalue;
 
 ScexDeviceHandler::ScexDeviceHandler(object_id_t objectId, ScexUartReader& reader, CookieIF* cookie,
                                      SdCardMountedIF& sdcMan)
-    : DeviceHandlerBase(objectId, reader.getObjectId(), cookie), sdcMan(sdcMan), reader(reader) {}
+    : DeviceHandlerBase(objectId, reader.getObjectId(), cookie), sdcMan(sdcMan), reader(reader) {
+  fsUnusableEventCd.timeOut();
+}
 
 ScexDeviceHandler::~ScexDeviceHandler() {}
 
-void ScexDeviceHandler::doStartUp() { setMode(MODE_ON); }
+void ScexDeviceHandler::doStartUp() {
+  filesystemChecks();
+  setMode(MODE_ON);
+}
 
 void ScexDeviceHandler::doShutDown() {
   reader.reset();
@@ -215,8 +220,12 @@ ReturnValue_t ScexDeviceHandler::interpretDeviceReply(DeviceCommandId_t id, cons
       }
       fileNameSet = true;
     } else {
-      ofstream out(fileName,
-                   ofstream::binary | ofstream::app);  // append
+      if (!sdcMan.isSdCardUsable(std::nullopt)) {
+        fsUnsableEvent();
+        return returnvalue::FAILED;
+      }
+      // Append to existing file.
+      ofstream out(fileName, ofstream::binary | ofstream::app);
       if (out.bad()) {
         sif::error << "ScexDeviceHandler::handleValidReply: Could not open file " << fileName
                    << std::endl;
@@ -280,18 +289,8 @@ ReturnValue_t ScexDeviceHandler::interpretDeviceReply(DeviceCommandId_t id, cons
 }
 
 void ScexDeviceHandler::performOperationHook() {
-  auto mntPrefix = sdcMan.getCurrentMountPrefix();
-  if (mntPrefix != nullptr) {
-    std::filesystem::path fullFilePath = mntPrefix;
-    std::error_code e;
-    fullFilePath /= "scex";
-    bool fileExists = std::filesystem::exists(fullFilePath, e);
-    if (not fileExists) {
-      bool created = std::filesystem::create_directory(fullFilePath, e);
-      if (not created) {
-        sif::error << "Could not create SCEX directory: " << e << std::endl;
-      }
-    }
+  if (getMode() != MODE_OFF) {
+    filesystemChecks();
   }
   uint32_t remainingMillis = finishCountdown.getRemainingMillis();
   if (commandActive and finishCountdown.hasTimedOut()) {
@@ -319,6 +318,33 @@ ReturnValue_t ScexDeviceHandler::initializeLocalDataPool(localpool::DataPool& lo
   return OK;
 }
 
+void ScexDeviceHandler::filesystemChecks() {
+  auto mntPrefix = sdcMan.getCurrentMountPrefix();
+  if (mntPrefix == nullptr or !sdcMan.isSdCardUsable(std::nullopt)) {
+    sif::warning << "SCEX: Filesystem currently unavailable" << std::endl;
+    fsUnsableEvent();
+  } else {
+    std::filesystem::path fullFilePath = mntPrefix;
+    std::error_code e;
+    fullFilePath /= "scex";
+    bool fileExists = std::filesystem::exists(fullFilePath, e);
+    if (not fileExists) {
+      bool created = std::filesystem::create_directory(fullFilePath, e);
+      if (not created) {
+        sif::error << "Could not create SCEX directory: " << e << std::endl;
+      }
+    }
+  }
+}
+
+void ScexDeviceHandler::fsUnsableEvent() {
+  if (fsUnusableEventCd.isBusy()) {
+    return;
+  }
+  triggerEvent(scex::FS_UNUSABLE);
+  fsUnusableEventCd.resetTimer();
+}
+
 ReturnValue_t ScexDeviceHandler::generateNewScexFile(const char* cmdName) {
   char timeString[64]{};
   auto activeSd = sdcMan.getActiveSdCard();
@@ -328,7 +354,8 @@ ReturnValue_t ScexDeviceHandler::generateNewScexFile(const char* cmdName) {
 
   std::ostringstream oss;
   auto prefix = sdcMan.getCurrentMountPrefix();
-  if (prefix == nullptr) {
+  if (prefix == nullptr or !sdcMan.isSdCardUsable(std::nullopt)) {
+    fsUnsableEvent();
     return returnvalue::FAILED;
   }
   timeval tv;
diff --git a/mission/payload/ScexDeviceHandler.h b/mission/payload/ScexDeviceHandler.h
index e7721ef6..ecde12a5 100644
--- a/mission/payload/ScexDeviceHandler.h
+++ b/mission/payload/ScexDeviceHandler.h
@@ -42,6 +42,7 @@ class ScexDeviceHandler : public DeviceHandlerBase {
   scex::Cmds currCmd = scex::Cmds::PING;
   SdCardMountedIF &sdcMan;
   Countdown finishCountdown = Countdown(LONG_CD);
+  Countdown fsUnusableEventCd = Countdown(10000);
 
   // DeviceHandlerBase private function implementation
   void doStartUp() override;
@@ -49,12 +50,15 @@ class ScexDeviceHandler : public DeviceHandlerBase {
   ScexHelper helper;
   ScexUartReader &reader;
 
+  void fsUnsableEvent();
+
   void performOperationHook() override;
   ReturnValue_t buildNormalDeviceCommand(DeviceCommandId_t *id) override;
   ReturnValue_t buildTransitionDeviceCommand(DeviceCommandId_t *id) override;
   ReturnValue_t buildCommandFromCommand(DeviceCommandId_t deviceCommand, const uint8_t *commandData,
                                         size_t commandDataLen) override;
   void fillCommandAndReplyMap() override;
+  void filesystemChecks();
   ReturnValue_t scanForReply(const uint8_t *start, size_t remainingSize, DeviceCommandId_t *foundId,
                              size_t *foundLen) override;
   ReturnValue_t interpretDeviceReply(DeviceCommandId_t id, const uint8_t *packet) override;
diff --git a/mission/payload/scexHelpers.h b/mission/payload/scexHelpers.h
index aa0f320b..06a8bb07 100644
--- a/mission/payload/scexHelpers.h
+++ b/mission/payload/scexHelpers.h
@@ -20,6 +20,7 @@ static constexpr Event EXPERIMENT_TIMEDOUT = event::makeEvent(SUBSYSTEM_ID, 1, s
 //! FRAM, One Cell or All cells command finished. P1: Command ID
 static constexpr Event MULTI_PACKET_COMMAND_DONE =
     event::makeEvent(SUBSYSTEM_ID, 2, severity::INFO);
+static constexpr Event FS_UNUSABLE = event::makeEvent(SUBSYSTEM_ID, 3, severity::LOW);
 
 enum Cmds : DeviceCommandId_t {
   PING = 0b00111,