I see...

Okay. Well, I have 5 or 6 new songs in my library that I need to synch to my device... I guess I'll give it a shot with the current settings and if I run into problems, change everything over to the USB sync and give it a try.

Thanks so much for the information!

Using the mass storage plugin requires manual configuration, whereas the WMDM plugin via MTP is setup mostly automatically.

that's really the only difference.

I asked this question on a different thread, but I think it got buried in the rest of the question. I have a Droid Bionic that I am syncing in MediaMonkey using MTP (Droid calls it "Windows Media Sync"). It works, but is very flaky (fails frequently) and EXTREMELY slow. Of course, to be fair, I'm syncing a very large library (around 2000 files) -- I'm not worried about how slow sync is when transferring files so much as how slow it is after it finishes... it sits for a very long time at 100%.

Someone posted a workaround using USB Mass Storage (which I have not yet tried) instead of MTP, but I don't honestly want to try it until I understand the differences between the two protocols. Why would I want to choose MTP vs USB (aside from the fact that MTP doesn't appear to be working particularly well). Is there some advantage to using MTP, and if not, why would the protocol even be an option? Will I lose any functionality by switching to USB Mass Storage?