i tried to connect my sansa m230 to my new computer that works with windows 7 and i got massage that i have connected an unknown divice.
i tried to set the m230 to msc/mtp mode and it doesnt work.
One usually gets this message when the device is in MTP (or Auto Defect) Mode and it cannot find the drivers necessary for an MTP connection. By the way, these drivers are included in Windows Media Player 10 and above.
Unless you really need MTP for DRM-protected files, MSC mode is the way to go. In this mode, your computer will see the device as any other external drive, so no drivers necessary.
You said you tried to set your player to msc/mtp mode. I don’t know what you are saying here. Did you try both modes (they are separate)? This USB setting is in Settings > USB.
You can also ‘force’ MSC mode by following this procedure:
Turn device OFF.
2. Facing the hold switch slide it to the right so an orange color would show putting the device on Hold.
Connect the device to the PC.
You might also try running Win 7 in Compatibility mode, either as Vista or XP.