USB Settings for M series

I have a bunch of the Sansa M series MP3 players and use them a lot. However I can only load them from one computer. When I plug a player into that computer, I open windows explorer and under the Sansa are two folders, Data and Media. The same player plugged into any other computer shows 3 folders, Config, Audible, and Record.

When I bought my first Sansa, I was having problems and tech support had me change something on my computer. Now I want to be able to load my player from other computers, but can’t find my media folder - and tech support is closed until Monday - any ideas??