Change Time Machine settings on Mac
On your Mac, use Time Machine settings to add or remove a backup disk, and specify options such as when to back up and which items to exclude from a backup.
To change these settings, choose Apple menu 
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Open Time Machine settings for me
Option | Description |
|---|---|
Add Backup Disk | If you haven’t set up Time Machine, click Add Backup Disk to set up a backup disk. |
Add or Remove Backup Disk | If you already set up Time Machine, do either of the following: Add a backup disk: Click the Add button Remove a backup disk: Click the Remove button |
Options | Click Options, then click any of the following to customize backup settings: Back up frequency: Choose whether to back up manually, or select how often Time Machine backs up your files automatically. Back up on battery power: Turn on to create backups every hour even if your Mac is on battery power. This option only appears when an automatic backup schedule is selected on a Mac laptop. Exclude these items from backups: Exclude files from a backup to save space on your backup disk, or to exclude items you back up using another method. Click the Add button |
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, Note: If you create a backup on a Mac, you can only use that backup on Mac computers. If you partition with macOS Monterey or later, you can only use the partitions with macOS Big Sur or later.