Quite often we have to recover data from the drives in external USB enclosures when the hardware is OK, but the data (usually $MFT) is corrupted in a certain way, similar in many cases. We always wanted to know what exactly causes this corruption. Our primary suspect is a driver USBSTOR.SYS, possibly version 5.1.2600.2586. We welcome any comments from people who experienced problems with the USB storage devices under Windows XP and use this version of the driver.