Mike Keslosky uses Time Machine, and wants to shift his Photos and iTunes libraries from his startup volume to an externally connected hard drive. But he’s concerned that after he moves those libraries and deletes them from his internal drive that Time Machine won’t back them up. Fortunately, Time Machine can back up any locally connected drive, although Apple configures it by default to excludes external drives. If you have a Mac Pro or another system that you’ve partitioned
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