I have a Western digital "mybook" which is an external hard drive in a case connected by a usb. I swap it out every day (two of them) its been working fine. Microsoft had an update and now it wont keep the drive . This is due to the first network drive is F: Which is the drive that is Microsoft is trying to assign to the hard drive. I now have to go into disk manager and re-assigned that drive every day. I assigned it to Z drive how can I keep the drive assignment w/o having to change the drive letter every day.