I just bought two identical USB hard drives to use with my nightly NTBackup of SBS 2003. I've been using an older drive for a while and it's been working well. What I intend to do is use the new ones and swap them out every Friday so I can take it offsite. How do I make sure the drive letter stays the same when I swap one for the other? The scheduled backup is using M: right now,which is the old drive's assigned letter.