Hi, I just wanted to share this for people who may not know. You can use your iPhone as a thumb drive without jailbreak using iTools here http://itools.hk/en_index.htm its free download and you dont have to install it, also runs on mac. I have tested this with my iPhone 5 but I guess it will work the same on other devices. Just connect your phone to the computer, open iTools and click Storage, then you can just drag and drop files to the phone etc. I tested this by copying the latest ubuntu iso to my iphone 5 from my work pc, then draging it back to my laptop when I got home.