Yes I did read the manual. But that's the thing with these things.
Sometimes they are too vegue. Didn't say anything about ultra cards or
anhything. Sometimes like in the case of the plextalks they get
specific, but not enough. My PTR1's rejected 3 cards already. Now I
doubt the M311 would but
Hi,
I am only familiar with the Book Port Plus, but if you have access to the user
manual it should tell you if certain type cards are to be used with the player.
A Google search should get you to the user manual if you don't have one.
Sometimes it is included with firmware.
HTH
Norma
-O
