One, there should be a setting on your Sansa that lets you choose if your device is read as a disk drive or as a media player. Window's differentiates betweent the two. Please refer to your documentation on how to change it.
That should solve both of your problems.
Second...with it set to "massive usb device" your device is a disk drive. To play music, select the files, and play them in your favorite media player. Generally you can select a file, right click, and click play in Windows Media player, or what ever program you choose.
Hopefully that helps.
IMO, I don't like using the crap ware they give you. I just use it as a disk drive and dump my music, documents, programming projects, whatever on it. The internal circuitry will decide which files it can play. It's just as easy to copy the music files to it as it is to use the program they think you should use.
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