I have two external hard disk cses one of them is an old Argosy PCMCIA Case for notebook hard disk and the another one is USB 2 Case. I have many old notebook hard disks, two of them when I use the Argosy PCMCIA case my computer detects the external hard disk and have no problems. But when I use the USB 2 Case my computer does not detect the external hard disk.These two hard disks I reformated and did check disk too and found nothing wrong.
I am looking for your help.
Thanks in advanced.

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