Hello, Time Machine works making about 10 days worth of backups, then returns the following error. "The backup disk ran out of space unexpectedly. Time Machine will try to make more space available by removing expired backups during the next scheduled backup." It never deletes old backups and will not work again until I delete the oldest backup manually. Mac Mini 10.8.5 Startup Drive: 275 GB used of 500 GB Data Drive: 114 GB used of 160 GB Time Machine Drive: 700 GB Partition of 1 TB Drive (300GB Used for clone of Startup Drive) Ideas?