I've had my Time Machine backup volume (sparsebundle) for a couple of years now and it's become quite large. Since it is very easy to delete old backups of certain directories in the GUI I was wondering if it is safe to just delete all backups of for example /System/ and a lot of subfolders of /Library/ because those files get replaced on every OSX upgrade and I won't ever go back to an old operating system anyway. Is that safe to do? There is nothing on the internet about that. Or is /System/ usually excluded anyway? That would kind of make sense, right?
Any thoughts on that? Thank you!