The standard answer to digital rights management (DRM) licensing issues for library books is set the Settings>System Settings>Usb mode explicitly to *MTP* and retransfer. The default value, Auto-detect, can switch between the two modes, and MSC mode supposedly does not support DRM.
For what it’s worth, I use Windows Vista with Windows Media Player up-to-date, *MSC* USB mode on the player (I prefer MSC), and OverDrive’s transfer button (using advanced options to change path to “\audiobooks”) when putting files on my players. I’ve never had the license issues. However, enough people on this forum have said *MTP* mode fixes their DRM license problems that I’m willing to suggest it as a solution.
Note: your *computer* can only see the files transferred in the mode you’re in (if you’re in MTP mode, you’ll only see other files transferred via MTP). Your Clip will be able to see files transferred in both MTP and MSC modes, but viewing files on the computer will give you the impression that files are missing if you switch between USB modes. It’s best to choose one mode and stick with it.
