Synchronize files question

Had a problem at first with the Overdrive audiobooks not going past the first 2 chapters.  After receiving advice from this forum, I did this:

Made sure my Windows Media Player was version 10 or above (apparently the older versions won’t let the digital rights work properly).

Transferred my audiobook in MTP mode from the Settings - USB Mode.  MSC mode won’t work properly either with Overdrive audiobooks.  My music is still in MSC mode and works fine.

I didn’t have to format or anything else.  All work fine now.  Hope that helps.