I have a problem with a new external hard drive I bought. In Windows XP, it appears as "Seagate Expansion Desk USB Drive" under Disk Drives in Device Manager, but it doesn't appear in Disk Management, where all the drives are listed. It also doesn't appear in My Computer. How can I allocate it a drive letter so I can use it? My drives go up to K, so it should be allocated L drive. Any help would be appreciated.