Slow USB Drive

Greetings Ozzu-ers! It has been quite a long time since I have emerged from my humble abode to post on this wonderful forum.

Recently I received a 4 gigabyte flash drive as a gift. Quite exciting, however I have discovered that it has read and write rates much slower than any other drive I own. In addition to this 4 gig I also have a 2 gigabyte. Using PerformanceTest 6.1 64-bit, I get a MB/Sec rate of ~5 with my 2 gig usb drive. With the 4 gig I get around 0.5 - 2 MB/sec. This is quite frustrating, and it causes the drive to be basically useless. I have tried it with FAT and FAT32, formatting with HP's format utility. I am accessing the drive in windows.

Nota bene: both of these drives are detected as USB 2.0 in Windows XP.

My system specs, for what it's worth:
ECS nForce 4 Mobo
AMD X2 64-bit 4200+ (Dual-core)
2x 512mb Corsair DDR2 800 (Dual Channel)

OS: Windows XP Pro 64-bit edition

Thanks for any help in advance.

Maybe this will show you what I mean:

http://img248.imageshack.us/img248/3082 ... 524or9.jpg

http://img174.imageshack.us/img174/9827 ... 542yj1.jpg

Where i: is my four gigabyte and j: is my two gigabyte.

I had slow time from my SanDisk 1GB drive also. When I first got it, the drive had a program on it.
It wanted me to register it and I chose to delete the program to give me more space. Since then it was not letting me open it without many request. I finally registered it and it has been working fine.
Don't know if that could help.