Formatted ext4, but the length is not too long, I can touch the file specified with no issue.

I'm reluctant to submit the logs. I took a look and the logs list the files being backed up in clear text. Unfortunately, since I have my files arranged in directories by my customer base, I feel that has too much proprietary information in it to just send out (i.e. my complete customer list)

I suspect it might be associated with compressing a compressed file, so I'm giving not compressing a shot.