Ok I see this player does have problems with 64GB cards. I can get more 32GBs and save money. I'm better off doing that. Thanks!

Does the X3 take a long time to read the micro sd card that's full with music? I'm hoping to buy a few 64GB micro SD cards to fit all my music on and use it primary to listen to music instead of the computer. I would like to easily swap memory cards.