not all the same.
PS...Are you sure about the USB 2.0 Quantum external case ... they merged with another drive mfg long long ago and I haven't heard anything about them since.
Hard to imagine they made a USB 2.0 external enclosure.
Hi,
I have a Mitsubishi 80 gb External USB Hard Disc that i use with quantum external case.
This is the kind you just need to plug into your USB port.
The problem is that while some systems detected the hard drive, many others do not.
I have used it on all Xp OS. It just does not get detected on certain sytems even though they have the same configuration as the ones that it does get detetcted on.
Can any one tell me what the problem might be?
Thank you.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic