Resumption Loop when backing up large directories

Hey, the plugin works great for me most of the time. It completes the database backup in under a minute, as well as some of the file backups, but when I try to backup my Uploads or Plugins (85 MB and 35.5 MB respectively) it won’t ever (successfully) finish the backup, it just enters a resumption loop then it fails. I assume that this is because of the file size.

I noticed that in other posts it was often recommended that I decrease the zip split size, and at 20 MB it still enters the resumption loop. My control panel (Plex) says I have a 60 second execution time and a 128M memory limit.

Any help would be greatly appreciated! ??
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