If you have used another disk for backup before, you’ll be asked Do you want to stop backing up to the previous disk and use the new disk, or back up to both.If the disk you selected to back up data is not formatted by Time Machine, you should click Erase in the prompt window to confirm.Step 3: erase disk or stop backing up to the previous disk. You can also click on the Options button to decide which data to backup.You can check Encrypt backups to secure your backup.Select the external disk you connected as the backup disk from the list.Click on the Select Backup Disk button (it's also named Select Disk in some systems).Click Apple menu -> select System Preferences -> click Time Machine.Step 2: open Time Machine and select disk.
#WHERE ARE BACKUO TIME MACHINE ON MAC HOW TO#
Please read the following ways carefully to know how to backup Mac yourself (these ways work for how to backup MacBook to external hard drive, how to backup iMac to external hard drive, etc.). It’s easier to access an external drive: the external drive can be accessed from any devices while you can’t access the internal drive if your Mac is crashed/dead.