What are .chunk, .merge, and .tmp files

On several occasions, Syncrify needs to create temporary files. These temporary files are created in the $TEMP folder on your machine. The exact location of this folder is OS-dependent. For example, on Windows, this could be C:\Windows\Temp, and is /tmp on Linux.

Syncrify removes temporary files once a synchronization job completes, provided there are no errors. However, in case of errors, these files are not deleted until the Syncrify server process terminates. Consider the following example:

• Client sends a file that is 10 GB in size. This file does not come to the server in one piece but in several chunks.
• Every time the server receives a chunk it appends the incoming data to this temporary file.
• Finally, when the entire file comes over, it moves this file from this temporary location to its final location
• If the client does not send the entire file successfully, which can occur due to a network problem, the server does not know when to delete the temporary file; therefore, it stays there for a longer period of time.

Temp Files Filling Up My Disk. What Can I do?

Lingering temp files are not a problem but a symptom of a different problem. As mentioned above, temp files are not cleaned when Syncrify runs into a problem during backup. To see the exact problem, refer to the logs on both client and server's end.

Can I delete these files?

Yes, you can. However, make sure you only delete files that are in use by Syncrify. A good practice is to remove files that are older than 24 hours, which will ensure the file is no longer in use.