| Tip 64 | Switch Time Machine Disks |
Once upon a time, Time Machine worked with just one destination—be that a removable disk drive you attached to your computer or a Time Capsule. However, with Mountain Lion and newer versions of OS X, you can seamlessly back up to multiple destinations. Each will contain a full Time Machine backup, with the most recently attached disk containing the most recent backup. If you have two or more backup devices attached at the same time, Time Machine will back up to each device in sequence (that is, if you have two backup disks attached, Time Machine will hypothetically back up to disk 1 at 1 p.m., disk 2 at 2 p.m., disk 1 at 3 p.m., disk 2 at 4 p.m., and so on, although the hourly time of backup will depend on when ...
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