Does the H3XX support downloaded music which has DRM Protection?
Answer
DRM stands for Digital Rights Management and is a software based method of protecting music files. This protection sets a time of use restriction on a given file requiring you to pay money to keep the music. Having DRM support means you can play copyrighted music acquired from an online service like Napster, or any other online service where you PURCHASE music.
If you purchased a North American H3XX player it will support DRM files natively.
If you flash to Korean or other non-American firmware,
you lose DRM permanently, because the code to use it differentiates from machine to machine. The non-DRM firmware will give you the ability to play video and also use the player as a USM device but you will lose DRM support. Not a big deal if you intend not to rent your music from the likes of Napster or Itunes.
Wikipedia has a much longer definition, see for extended reference:
http://en.wikipedia.org/wiki/Digital_rights_management
edited slightly
sdz