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Comments about LaCie LaCie d2 Quadra Hard Drive, 500 GB Disk Drive with Quadruple Interface, eSATA 3Gbits, FireWire & USB 2.0, for Mac & Windows,:
Used for Time Machine (backup) on a iMac.
Multiple interfaces are most useful.
Disk must be formatted for Windows or Mac, but not both, so it can not be used for transferring files from a PC to a Mac.