When I want TimeMachine to backup my computer, I usually plug my external hard drive before going to bed. Unfortunately, I am already in the position where new backups are replacing old ones on the drive. So I am quite worried when I see that TimeMachine is creating many different snapshots during the night.
Are these identical backups going to affect the oldest ones on my drive?
Or since they are identical, TimeMachine does not remove an old snapshot everytime it creates a new one?
I am a bit confused and would like to know if I need to change my backing up routine, like doing it at the same time as I am behind the computer, to be able to unplug the drive right after?