i can confirm fat32 usb stick works with mp3 ..i have one mp3 folder with 7 songs and it detects the folder as USB folderICON01 musicSong#01,etc in the display
when i try to use a usb hub, it wont work..says 'UNSUPPORTED', i don't think u can even use the port to charge phone/device ...power or current is too weak i think
i have an old iphone4, ill try to plug that in, see what it says
wow, not bad, it picks up the iphone4 as an IPOD, shows a better cleaner music interface MENU display..definitely works well if u got iphone or ipod
i used a usb extention so the connection sticks out of the console box..imo easier access to plug and unplug ur multiple devices , i'll just get a two port cigarette charger
also its picky, it won't detect iphone if u use certain cables, maybe its gotta be those 'data and charge' usb cables, not charge only cable...and it can't be those multi pronged ones...i tried the 3 headed cheap chinese ones with the iphone5, iphone4 and android microUSB ports, it didn't detect USB (didn't load the songs)
i think it only 'reads' .mp3 files on a FAT32 device... and all music/audio types if u have iphones/ipods?(unconfirmed as i only have mp3 files on my iphone 4) i don't use itunes or pay for any music