My Dell laptop with XP Home OS had no problems with any external hard disk or stick. Suddenly, when I plug in a hard disk I get a message "MTP Device Detected" and the computor does not see the disk. Device Manager sees only a USB stick. How did this arise and what is the answer.
Two thing to try, try making sure that the hard drive is powered up and ready BEFORE you plug in the USB plug. If this does not work or its USB powered, then with the USB plug connected and the hard drive powered up go to Device Manager and delete the USB hard disk device driver. Then remove and refit the USB hard disk and allow the computer to reinstall the driver.