Deleting files from one of three Time Machine backups


macrumors 68040
Original poster
Jul 13, 2008
I backup via TM to three drives, one big one, and two that rotate offsite alternately.

One of the backups is full, per TM, and can no longer back up files.

How would I delete a folder of files on THAT backup? can I simply go into the backups.backupdb and delete a whole backup? If I do the Enter Time Machine... method, I can select an old backup, but I cannot specify that it delete ONLY from one of my backup drives, instead of all of them. Only one drive is near full, and although it would be ideal if all were the same size yadda yadda I know that the full drive is the oldest and has stuff I definitely do not need.