I have two external hard drives connected to my Mac with OS X El Capitan. I am using one of the external hard drives with Time Machine as the back up hard drive only. The second external hard drive I use to store my many photos. How can I get Time Machine to back up both the internal Mac hard drive and the external hard drive storing my photos? Right now, it will only back up the Mac internal hard drive. I need it to also back up the external hard drive.
Mac – Can Time Machine back up an external hard drive in addition to internal one
backupexternal-disktime-machine
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Best Answer
Yes - you should be able to backup your external drive with the photos by removing it from the "Exclude" tab in the Time Machine pane in System Preferences (in this case the external drive is FCPX):
As Nancy Casas also mentioned, a disk in gray will have to be reformatted for Mac, while one in black will not.