diff --git a/application/MissionManager/src/AppMonitor.cpp b/application/MissionManager/src/AppMonitor.cpp
index 5d215ce..5dee328 100644
--- a/application/MissionManager/src/AppMonitor.cpp
+++ b/application/MissionManager/src/AppMonitor.cpp
@@ -174,7 +174,7 @@ StatusCode AppMonitor::GetThumbnail(AppGetThumbnail &param)
     // param.mThumbnail = "./34a396526922a33e97906920dbfef2a5.jpg";
     const std::string webServerDocumentRoot = IAppManager::GetInstance()->GetFilesSavingRootPath();
     const std::string thumbnailFile = MediaTask::GetThumbnailNameByTargetName(param.mFile);
-    param.mThumbnail = RemovePrefix(thumbnailFile, webServerDocumentRoot);
+    param.mThumbnail = thumbnailFile;
     return CreateStatusCode(STATUS_CODE_OK);
 }
 SdCardStatus AppMonitor::SdCardStatusConvert(const StorageEvent &event)
diff --git a/application/MissionManager/src/SdCardHandleState.cpp b/application/MissionManager/src/SdCardHandleState.cpp
index 60afa67..0ff6828 100644
--- a/application/MissionManager/src/SdCardHandleState.cpp
+++ b/application/MissionManager/src/SdCardHandleState.cpp
@@ -99,12 +99,19 @@ bool SdCardHandleState::SdCardEventHandle(VStateMachineData *msg)
         mFileNeedToSave.reset();
     }
     mSdCardStatus = data->mData;
+    /**
+     * @brief The file management uses a database. When the SD card is inserted or removed, the card's file data needs
+     * to be reinitialized.
+     */
     if (StorageEvent::SD_CARD_INSERT == mSdCardStatus) {
         IFilesManager::GetInstance()->Init();
         std::shared_ptr<VMissionData> message =
             std::make_shared<VMissionData>(static_cast<MissionEvent>(InternalStateEvent::CHECK_UPGRADE_FILE));
         MissionStateMachine::GetInstance()->SendStateMessage(message);
     }
+    else {
+        IFilesManager::GetInstance()->UnInit();
+    }
     SetSdCardLedsStatus(mSdCardStatus);
     return EXECUTED;
 }
diff --git a/utils/MediaBase/src/FfmpegThumbnail.cpp b/utils/MediaBase/src/FfmpegThumbnail.cpp
index 0f21f97..c650de9 100644
--- a/utils/MediaBase/src/FfmpegThumbnail.cpp
+++ b/utils/MediaBase/src/FfmpegThumbnail.cpp
@@ -169,7 +169,10 @@ void FfmpegThumbnail::GetDecodeDataCallback(AVFrame *frame)
         goto END;
     }
     system("echo 1 > /proc/sys/vm/drop_caches");
-    // Perform pixel format conversion.
+    /**
+     * @brief Perform pixel format conversion.
+     * NOTE: This function will crash when the chip does not have enough memory.
+     */
     sws_scale(mSwsCtx, frame->data, frame->linesize, 0, frame->height, thumbnailFrame->data, thumbnailFrame->linesize);
 
     if (mEncoder) {
diff --git a/utils/WebServer/src/WebServer.cpp b/utils/WebServer/src/WebServer.cpp
index 9314a12..64dce94 100644
--- a/utils/WebServer/src/WebServer.cpp
+++ b/utils/WebServer/src/WebServer.cpp
@@ -21,6 +21,7 @@
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
+// #include <string>
 #include <sys/stat.h>
 #include <unistd.h>
 
@@ -103,9 +104,14 @@ static void get_thumbnail_handle(const char *thumbnailUrl, void *context)
     unsigned char *buffer = nullptr;
     size_t bytesRead = 0;
     long int fsize = 0;
-    file = fopen(thumbnailUrl, "rb");
+    constexpr int BUFFER_SIZE = 256;
+    char filePath[BUFFER_SIZE] = {0};
+    // const std::string url = thumbnailUrl;
+    // const std::string thumbnailFile = GOAHEAD_DOCUMENTS_PATH + url;
+    snprintf(filePath, BUFFER_SIZE - 1, GOAHEAD_DOCUMENTS_PATH "%s", thumbnailUrl);
+    file = fopen(filePath, "rb");
     if (file == nullptr) {
-        LogError("Open picture failed[%s].\n", thumbnailUrl);
+        LogError("Open picture failed[%s].\n", filePath);
         goto END;
     }
     fseek(file, 0, SEEK_END);