The model number of the external hard drive is: PA4096-1HF4 Its a 3.5 inch, 640GB external drive from Toshiba with USB 2.0 interface. The OS is Windows 7 Home Ultimate (64 bit). As per this URL : Windows 7 Compatibility for Storage Devices: Hard Drives, External Hardware: Download Device Drivers, this model is NOT compatible with Windows 7. Is there any way for Windows 7 to recognize this external drive and allow me to access the files on this drive without problems? Any assistance will be much appreciated. Thank You.