I disconnected my maxtor basics 500gb from my laptop to use it on a different machine. The other machine would not read and when I reconnected to the original laptop that wont read it either
My guess is that something "bad" happened (electrical surge???) when you first disconnected it.
Your only option is to assume that the USB-to-disk-drive adapter inside the casing has failed. So, open the case, remove the disk-drive, and connect the disk-drive to another computer, and see if the drive itself is still "readable". If so, copy all the files, onto the other computer, or burn some DVD disks.
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My guess is that something "bad" happened (electrical surge???) when you first disconnected it.
Your only option is to assume that the USB-to-disk-drive adapter inside the casing has failed. So, open the case, remove the disk-drive, and connect the disk-drive to another computer, and see if the drive itself is still "readable". If so, copy all the files, onto the other computer, or burn some DVD disks.