I am using a 500GB Drive for my Time Machine drive, which is the same size as my main drive… rather than what is recommended, which is a Time Machine drive that is double the size of the drive you are backing up. I finally got Time Machine Successfully working on February 17th. My main drive has been between 80% and 90% full the entire time. Today for the first time, Time Machine reported that the backup drive was full and it had to delete the oldest backup (the one from February 17th). The oldest is now from February 24th.
A bit more than two months, even with just that little bit of free space. That isn’t too bad.
I still want to pick up a 1GB drive though. With the “double the main drive” recommendation, I could probably keep a full year or more of backups…
I also need to do something about that 90% full thing. That is a bit too high.
Hmmm, emptying the trash only got me to 85%. I was hoping for more. I’ll have to go looking for more things I am OK getting rid of this weekend or something.