Sorry if this has already been posted. Is it possible to limit the size of Disk Space allocated for time machine to use? I feel like more than half of my external drive is used by time machine already and It really irritates me. Will it be possible to delete old back ups? I am sure my Time Machine is eating up at least 100gigs of my 250gigs hard disk Thanks in advance. ***** presently I'm thinking of reformatting my external hard disk and assign only 30 gigs for time machine, do you think this is a better set up?