I want an external drive to support Time Machine backups of my iMac, which currently has 805 GB free space on its 1 TB internal drive. How big should this backup disk be?
Time Machine
Maintaining backups with Time Machine or third-party software over a WiFi network is very convenient, but when it goes wrong can be a devil to repair. Here’s how to unravel these problems.
Crashes don’t come any harder than when your Mac just sits there, your startup disk missing or unusable. Here is how to prepare for, and recover from, such a hard crash.
The Eclectic Light Company 