Ako koristis zadnju verziju Windows Media Playera, nebi trebao osjetiti neku bitnu razliku izmedju UMS i MTP verzije ionako (cak je meni MTP bila i bolja jer nisam morao gasiti preko "Safely Remove Hardware")...
Doduse, malo je zeznuta situacija ako cesto spajas player na razlicite kompjutere.

Nisam puno kopao o tome, ali procitah ovo:

"I had seen on the Iriver website, as well as on a couple websites that people had used that program to switch over to UMS, but Iriver states that it will only work on the EU version, and (although I'm not completely sure about this) I think the websites I read had mentioned of people using the program to go back and forth on the EU versions."

Ako imas US MTP verziju, probaj skinuti neki EU MTP firmware i flashati njega (bez iriver updatera jer ce ti skinuti US verziju ako je ta vec unutra), a nakon toga probaj s iriver updaterom prebaciti u UMS mode (posto to, navodno, radi s EU verzijom firmwarea).

Nakon toga mozes staviti neki US UMS firmware ako postoji jer je US verzija vjerojatno glasnija od EU verzije (zbog jednog EU zakona).