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
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?