Just bought a 8GB SDHC Class 4 which I'm planning to use just for movies
It works perfectly fine on this player
It was a discount from Sandisk only 24 Euro for 8GB that's cheap here
EDIT:
One funny thing I just noticed I gave my MP3 a name in Mac which was "Dylan's MP3" but to my surprise there was a song called "Dylan's.MP3" in the all music list I tried playing it it gave a file open error
I now changed the name to "MP3 Dylan"
But I think it somewhat funny that it appeared, it's not bad because it didn't crash the MP3 when I played and that for a chinese Mp3