iPhone and iPod using the USB

Issue resolved after trying to use the iPhone 4S the 30 pin adaptor for the iPhone 5 and also a few iPods the verdict is that apple is only compatible with the USB for charging purpose by Bluetooth everything works perfect.After all intents then I decide to try a USB stick 8g and presto I have all my music art work cover etc.. works flawless and is better since I don't have to plug in and plug out constantly the iPhone which is a pain.