Hi. I have been experiencing abberant pendrive behaviour, and don't know what the problem might be. I can upload files to it, but when I try to copy anything back to my hard drive, after copying one directory it gets stuck and then it says something about bad parameters, and then when I access the drive (the pendrive) it shows as blank. Can anyone recommend a piece of software that diagnoses flash memory problems or tests such memories for errors, or otherwise explain what the problem might be? I am running windows xp sp2 on a desktop with AMD Athlon 2400+ and the pendrive is plugged in through an extension USB cable into the mainboard's usb socket.