Windows 7: External hard drive

Hi, I have had a problem with my external hard drive starting in Vista, and continuing in Windows 7. It is a SimpleTech Simple Drive, 120GB external hard drive. When ever I navigate, or in any way access certain folders on my extHDD, the drive begins to continuously be active, reading or what ever its doing, the activity light stays lit, and it freezes Windows Explorer and stays that way for litterally hours, non stop. I've read that it could be system restore, but its not enabled for that drive. I've read that it could be indexing, but when I open up that dialog box, it says indexing is complete. This has become VERY ANNOYING. I cannot access the files in certain folders untill it is done doing whatever it is doing. The only way I can regain control of the computer while this is happening is (because I have a laptop) close the lid, wait a few seconds untill the computer goes to sleep and unplug the extHDD. Does anyone know first what is causing this, and second what to do about it? I do have media files on the drive, and usually this happens when trying to access them, but its not like it does it the first time I try to access them and then its fine, it does it every time, ongoing.

System specs:
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Dell Inspiron E1505
Intel Core Duo ~1.67Ghz
2GB Ram
Windows 7 RC1
SimpleDrive 120GB(USB)

Any forgotten details, please ask
Thank you.

By the way, I dont know, but I doubt its a driver issue, it happened in Vista and I had all the Dell/Vista drivers installed...
Also, can I install the same Vista drivers I was using in Vista, on Windows 7? I dont see any new drivers for Windows 7 on the Dell website yet.