Microsoft Windows XP mounts external USB drives automatically. When the drive is connected to a USB port and powered on, Windows detects the drive and assigns it the next available drive letter. It is possible to manually mount the drive to a folder on another drive, or assign a different drive letter. The contents of the drive appear when the folder or drive letter mount point is clicked. The contents of the drive can be accessed and modified in multiple locations. Use the Windows XP DISKPART command line utility to manually mount USB drives. Tips Warnings Writer Bio

How to Mount USB Drives in Windows XP - 54