I can't decide which size iPhone to get and i don't have much time to decide. I have unlimited data from AT&T. I already have a .me account so I plan to use iCloud. Will my phone still store photos and videos on it or will they just be in the Cloud? Will the cloud always have a back up for me and where will the non-Cloud version be? If I want to see the photos on my computer or iPad or iPhone, will they be downloaded then... or actually on the device? Thanks!!