External HD not deleting old backups to make space...why?
I realize it needs cushion for workspace as well as not backing up more frequently will cause TM to do a brand new full backup. How often do i need to do this? I am on a laptop, and don't carry it with me, nor have it conveniently out to protect it from damage.
TIA! 🙂
MacBook Pro (15-inch, Mid 2012), OS X Mountain Lion (10.8.4)