Hi, Great forum, I travel a lot and use goodreader and avplayer app for video. I have read that in 4.2.1 the voltage was lowered which made USB hit and miss certain ones would work others not. My question is do sd cards which presumably take less voltage always work? I'd like advice before I buy a cck and 32gb sd card to put my movies and stuff on. Also is it better to get a full sized sd or a micro sd with adapter or does it not matter? I know I can get a aftermarket 5-1 cck from eBay for 11 pounds. Thanks for any advice in advance.