Can TimeMachine backup files that are ON an external disk?

Discussion in 'macOS' started by OCDMacGeek, Oct 27, 2007.

  1. OCDMacGeek macrumors 6502a


    Jul 19, 2007
    I keep my iTunes folder on an external drive, because it is too big to keep on my Mac mini's drive, and I really cannot afford to ever lose these files. Is there any way to set up TimeMachine to actually backup these files (which are on an external disk) to a different external disk?

    Thanks for your help.
  2. drlunanerd macrumors 68000


    Feb 14, 2004
    Yes, this should work. Attach the drive you want to backup, then in Time Machine preferences, click on Options.. set it to *not* exclude the drive by removing it with the minus button.

    I tried this and it started the backup process. Annoyingly though it stopped and prompted me saying there wasn't enough free disk space on the second external drive I was backing up to, when there was 30GB more than was needed. Time Machine seems to overcompensate when calculating space requirements - I checked the system log and sure enough it's erroneously reporting this.

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