Instructions on how to change a Sansa Express from MTP mode to MSC mode

This was a lifesaver. And, so easy! Thanks

THis didn’t work for my sansa 260R

For one thing It lists my sansa under “disk Drives” in the device manager( and it lists 2 of them?) and when I get to the box where I’m suposed to be able to select USB Mass Storage device it’s not an option, my only option is “disk Drive”

I can’t get my sansa to format ( it says it’s formating but when I start it it hasn’t erased anything) so I wanted to check it for errors and read another post saying to put it in MSC mode to do so, but I can’t get that to work either. any ideas?