So, I have most of my data on a NAS.

Can I configure time machine to backup both my iMac's internal drive as well as my data stored on a NAS? All of the backups are to be stored on an USB drive attached to my iMac.

I'm running Mountain Lion. The NAS I have is here:


I'm not sure which protocol I'm using right now, but it supports AFP.

  • Does your NAS mount as a network share? If so, what transfer protocol does it use? – Nathan Walker Jul 26 '12 at 3:29
  • Yes, it's a network share. Please see my edits, and thanks! – John Jul 26 '12 at 13:42

While Time Machine always backs up all mounted volumes connected to the Mac via USB/FireWire/Thunderbolt, it can't backup network volumes like a NAS.

As it seems, this is not mentioned anywhere in Apple's support documents, but here's a good Time Machine FAQ made by a user.

  • Wow!!! That's fantastic...I wish Apple would add more options to Timemachine so you'd know what's it's actually doing. What's the recovery process like if you need to restore the NAS from the Timemachine backup? – John Jul 31 '12 at 13:24
  • well, you open your mounted NAS in Finder and enter Time Machine (click the icon in the dock or select from menubar icon) and go back in time as usual. – kremalicious Jul 31 '12 at 18:06
  • I checked my Timemachine backup folder and the NAS isn't there only "Macintosh HD"... – John Aug 1 '12 at 2:38
  • Is the NAS maybe added automatically to the exclude list in the Time Machine options? – kremalicious Aug 1 '12 at 12:11
  • Nope. It's not on the excluded list. Are you sure Time Machine can back up a NAS? – John Aug 2 '12 at 1:05

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