I can't answer the USB issue, but the case can be disassembled and the drive can be daisychained in another system using the IDE connector and powersupply connection. This should be done by someone that knows computer basics. The data is there, but not accessable by USB. Note: One of the indented dots on the WD case has a #1 phillips screw that must be removed, and a flex plastic retainer that must be depressed (on both ends of the case) to disassemble the unit. I just rescued data for a customer using this proceedure.
The USB. Hopefully you used the USB notifier in the TSR area to disconnect the drive. If you didn't, the usb connector may be fried.
Hope this helps.