Since I noticed TimeMachine continuously backing up large files, I had a look with tmutil compare to see where those files are located. Since I had not worked on my mac book air but used it to listen to music I suspected the iTunes library.

As it turns out TimeMachine is continuously backing up /Library/Backblaze.bzpkg/.

Do I really need a backup of this directory? I see the point that in case I have a hardware failure but my TimeMachine is still working I might need to re-upload everything to Backblaze again?

What would be arguments against putting /Library/Backblaze.bzpkg/ into the excluded items list of Time Machine?

1 Answer 1


This file is where Backblaze stores information about what is stored on their servers and copies of files being uploaded or about to be uploaded. I would exclude this from Time Machine backups, as it will often change and contains nothing you're not already backing up elsewhere.

  • 1
    I think this is correct but is there any documentation showing this?
    – mmmmmm
    Apr 24, 2016 at 17:38

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