I've just found that a hard drive I don't need to backup has been include in Time Machine backups for a while.

Is there a way I can exclude that drive from the backup history, or all I can do is avoid it being backup in the next runs?

2 Answers 2


Once you’ve excluded the drive from future backups using System Preferences → Time Machine, open Time Machine on your computer, secondary-click on the disk to delete and choose ‘Delete All Backups of disk’.



Open Time Machine in System Preferences and click on the padlock icon in the lower-left corner of the pane. See image below.

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Now click on the Options key in the lower right. You can select which files/folders/Volumes to exclude from your backup. See image below

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