diff --git a/linux/payload/plocMpsocHelpers.h b/linux/payload/plocMpsocHelpers.h
index ffd077d9..ef03359d 100644
--- a/linux/payload/plocMpsocHelpers.h
+++ b/linux/payload/plocMpsocHelpers.h
@@ -6,10 +6,10 @@
 #include <linux/payload/mpsocRetvals.h>
 #include <mission/payload/plocSpBase.h>
 
-#include "OBSWConfig.h"
 #include "eive/definitions.h"
-#include "fsfw/globalfunctions/CRC.h"
+#include "fsfw/returnvalues/returnvalue.h"
 #include "fsfw/serialize/SerializeAdapter.h"
+#include "fsfw/serialize/SerializeIF.h"
 
 namespace mpsoc {
 
@@ -838,20 +838,45 @@ class TcSimplexSendFile : public TcBase {
       : TcBase(params, apid::TC_SIMPLEX_SEND_FILE, sequenceCount) {}
 
   ReturnValue_t setPayload(const uint8_t* commandData, size_t commandDataLen) {
+    if (commandDataLen < MIN_DATA_LENGTH) {
+      return INVALID_LENGTH;
+    }
     if (commandDataLen > MAX_DATA_LENGTH) {
       return INVALID_LENGTH;
     }
-    std::string fileName(reinterpret_cast<const char*>(commandData));
+    const uint8_t** dataPtr = &commandData;
+    ReturnValue_t result = SerializeAdapter::deSerialize(&chunkParameter, dataPtr, &commandDataLen,
+                                                         SerializeIF::Endianness::NETWORK);
+    if (result != returnvalue::OK) {
+      return result;
+    }
+    if (chunkParameter == 0) {
+      return INVALID_PARAMETER;
+    }
+    std::string fileName(reinterpret_cast<const char*>(*dataPtr));
     if (fileName.size() + sizeof(NULL_TERMINATOR) > MAX_FILENAME_SIZE) {
       return FILENAME_TOO_LONG;
     }
-    spParams.setFullPayloadLen(commandDataLen + CRC_SIZE);
-    std::memcpy(payloadStart, commandData, commandDataLen);
+    size_t currentCopyIdx = 0;
+    size_t payloadLen = fileName.length() + sizeof(NULL_TERMINATOR) + CRC_SIZE;
+    if (chunkParameter > 1) {
+      char divStr[12]{};
+      sprintf(divStr, "DIV%03d", chunkParameter);
+      std::memcpy(payloadStart, divStr, DIV_STR_LEN);
+      payloadLen += DIV_STR_LEN;
+      currentCopyIdx += DIV_STR_LEN;
+    }
+
+    std::memcpy(payloadStart + currentCopyIdx, *dataPtr, fileName.length());
+    spParams.setFullPayloadLen(payloadLen);
     return returnvalue::OK;
   }
 
  private:
-  static const size_t MAX_DATA_LENGTH = 256;
+  uint32_t chunkParameter = 0;
+  static constexpr size_t MAX_DATA_LENGTH = 256;
+  static constexpr size_t MIN_DATA_LENGTH = 4;
+  static constexpr size_t DIV_STR_LEN = 6;
 };
 
 /**