Purchased Seagate "Backup Plus" 3TB usb 3 external drives, but they can't been seen by Win 7 64-bit Home Premium. Disconnecting/reconnecting usb and/or power has no effect. Ideas would be appreciated.
By the way, I have no problems with any of the 2 TB drives.
Note: The printed s/n & part no label on the boxes have been covered with a thin white label, but the original data can still be...
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