This isn't a post processing problem, the backup did not finish. There was a write error on the backup archive. That usually means you are either out of disk space, or the archive file has exceeded your host's file size limit. You have the part size set to zero, so there is no size limit on the archive file. That's bad for several reasons. In PHP, 2 GB is a magic number and archives larger than that can be unreliable, it depends on the server. The default part size is 2 GB, How large was your last successful backup?
Dale L. Brackin
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