try fix

app/api/routes/progressive_storage.py

@@ -80,7 +80,7 @@ async def s_api_v1_5_storage_post(request):
         make_log("uploader_v1.5", f"Resuming upload session with ID: {upload_id}", level="INFO")
     
     # Determine the temporary file path based on upload_id
-    temp_path = os.path.join(UPLOADS_DIR, f"temp_{upload_id}")
+    temp_path = os.path.join(UPLOADS_DIR, f"v1.5_upload_{upload_id}")
     
     # Check current size of the temporary file (if it exists)
     current_size = 0
@@ -99,6 +99,10 @@ async def s_api_v1_5_storage_post(request):
     try:
         mode = 'wb' if is_new_upload else 'ab'
         async with aiofiles.open(temp_path, mode) as out_file:
+            data = request.body  # Get the full body if available
+            if data:
+                await out_file.write(data)  # Write the whole body at once
+            else:
                 async for chunk in request.stream:
                     await out_file.write(chunk)
         new_size = os.path.getsize(temp_path)