How can I clone multiple computers on one drive?

Episode 1055 (1:59:49)

Bill from Thousand Oaks, CA
Seagate 4TB hard drive

Bill bought a Seagate 4TB hard drive and wants to do a mirrored backup with two different computers. Leo says to just make four folders and do the mirror into each folder. No need to partition, but he should just remember that he'll need to periodically back it up to make sure he's getting the new data.

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