I have 2 external drives that I use to back up to. I swap them out every week. I want them to both use drive letter X. They are never plugged in at the same time. If I plug in drive A and set the drive letter to X unplug it and plug it back in the drive is still set to drive X. If I plug drive B in and set it to X unplug it and plug it back in it is still set to drive X. If I unplug A and plug in B the drive reverts back to the next available drive letter (E) and if I am using B and switch it to A it does the same thing. Is there any way to keep both drives to use letter X?