I wonder for Time Machine, if I delete 3 files on the hard drive that I will for sure never want to use again (for example, that are 1GB each), can I tell Time Machine that please don't archive these files and remove them from the history so they don't need to occupy any space?
Can Time Machine also be configure to keep history for up to 6 months (or 4 weeks)? Or otherwise, how does Time Machine handle it when the backup hard drive is full? (will it automatically delete the oldest history?) thanks.