Finding: My iPad (32GB) is always full and I have to go through a pc and itunes to make loads or changes this key is used to make the link between a PC and an ipad or iphone, store, copy data, can open and read live: film, doc, pdf, photos..etc No need to have your personal pc on hand, any one will do ..... it helps to get out of the shackles apple ..! A great product, confirmed by apple ..... the price has come down since his arrival and it becomes affordable and indispensable