diff --git a/bsp_q7s/fs/SdCardManager.cpp b/bsp_q7s/fs/SdCardManager.cpp
index 4a6c12a1..8cea0991 100644
--- a/bsp_q7s/fs/SdCardManager.cpp
+++ b/bsp_q7s/fs/SdCardManager.cpp
@@ -459,7 +459,7 @@ void SdCardManager::setBlocking(bool blocking) { this->blocking = blocking; }
 
 void SdCardManager::setPrintCommandOutput(bool print) { this->printCmdOutput = print; }
 
-bool SdCardManager::isSdCardUsable(sd::SdCard sdCard) {
+bool SdCardManager::isSdCardUsable(std::optional<sd::SdCard> sdCard) {
   {
     MutexGuard mg(mutex);
     if (markedUnusable) {
@@ -474,20 +474,27 @@ bool SdCardManager::isSdCardUsable(sd::SdCard sdCard) {
     sif::debug << "SdCardManager::isSdCardMounted: Failed to get SD card active state";
     return false;
   }
+  if (not sdCard) {
+    sdCard == sd::BOTH;
+  }
   if (sdCard == sd::SLOT_0) {
     if (active.first == sd::MOUNTED) {
       return true;
     } else {
       return false;
     }
-  } else if (sdCard == sd::SLOT_1) {
+  }
+  if (sdCard == sd::SLOT_1) {
     if (active.second == sd::MOUNTED) {
       return true;
     } else {
       return false;
     }
-  } else {
-    sif::debug << "SdCardManager::isSdCardMounted: Unknown SD card specified" << std::endl;
+  }
+  if (sdCard == sd::BOTH) {
+    if (active.first == sd::MOUNTED && active.second == sd::MOUNTED) {
+      return true;
+    }
   }
   return false;
 }
@@ -567,6 +574,9 @@ void SdCardManager::setActiveSdCard(sd::SdCard sdCard) {
 
 std::optional<sd::SdCard> SdCardManager::getActiveSdCard() const {
   MutexGuard mg(mutex);
+  if(markedUnusable) {
+    return std::nullopt;
+  }
   return sdInfo.active;
 }
 
diff --git a/bsp_q7s/fs/SdCardManager.h b/bsp_q7s/fs/SdCardManager.h
index 8ce13dbc..749cae62 100644
--- a/bsp_q7s/fs/SdCardManager.h
+++ b/bsp_q7s/fs/SdCardManager.h
@@ -206,7 +206,7 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
    *
    * @return  true if mounted, otherwise false
    */
-  bool isSdCardUsable(sd::SdCard sdCard) override;
+  bool isSdCardUsable(std::optional<sd::SdCard> sdCard) override;
 
   ReturnValue_t isSdCardMountedReadOnly(sd::SdCard sdcard, bool& readOnly);
 
diff --git a/mission/devices/ScexDeviceHandler.cpp b/mission/devices/ScexDeviceHandler.cpp
index 1cc2cd39..db562f66 100644
--- a/mission/devices/ScexDeviceHandler.cpp
+++ b/mission/devices/ScexDeviceHandler.cpp
@@ -1,5 +1,6 @@
 #include "ScexDeviceHandler.h"
 
+#include <fsfw/filesystem/HasFileSystemIF.h>
 #include <linux/devices/ScexHelper.h>
 #include <mission/memory/SdCardMountedIF.h>
 
@@ -200,6 +201,10 @@ ReturnValue_t ScexDeviceHandler::interpretDeviceReply(DeviceCommandId_t id, cons
 
   ReturnValue_t status = OK;
   auto oneFileHandler = [&](std::string cmdName) {
+    auto activeSd = sdcMan.getActiveSdCard();
+    if (not activeSd) {
+      return HasFileSystemIF::GENERIC_FILE_ERROR;
+    }
     fileId = date_time_string();
     std::ostringstream oss;
     auto prefix = sdcMan.getCurrentMountPrefix();
@@ -216,6 +221,10 @@ ReturnValue_t ScexDeviceHandler::interpretDeviceReply(DeviceCommandId_t id, cons
   };
   auto multiFileHandler = [&](std::string cmdName) {
     if ((helper.getPacketCounter() == 1) or (not fileNameSet)) {
+      auto activeSd = sdcMan.getActiveSdCard();
+      if (not activeSd) {
+        return HasFileSystemIF::GENERIC_FILE_ERROR;
+      }
       fileId = date_time_string();
       std::ostringstream oss;
       auto prefix = sdcMan.getCurrentMountPrefix();
diff --git a/mission/memory/SdCardMountedIF.h b/mission/memory/SdCardMountedIF.h
index d88bb57a..ac705e8d 100644
--- a/mission/memory/SdCardMountedIF.h
+++ b/mission/memory/SdCardMountedIF.h
@@ -10,7 +10,7 @@ class SdCardMountedIF {
  public:
   virtual ~SdCardMountedIF(){};
   virtual const std::string& getCurrentMountPrefix() const = 0;
-  virtual bool isSdCardUsable(sd::SdCard sdCard) = 0;
+  virtual bool isSdCardUsable(std::optional<sd::SdCard> sdCard) = 0;
   virtual std::optional<sd::SdCard> getPreferredSdCard() const = 0;
   virtual void setActiveSdCard(sd::SdCard sdCard) = 0;
   virtual std::optional<sd::SdCard> getActiveSdCard() const = 0;