Hi... I am Cary, from Houston.I would like to purchase a new IPad Air, and want to be able to transfer pdf files, on all 150 clients, to an IPad Air. I would need to store approximately 750 pages of pdf text.I will also have a few books, magazines, and pictures on the device. I will not store much music or movies. My question is which IPad is best for keeping up with my files? I want to have enough storage so as to be able to both enjoy the device, as well as have all of my client's data available on the device, as well as on both my MacBook Pro and in the cloud; I have been told that the 32 - 64 gig should take care of it, but then some say purchase the 128 IPad Air... What do you think? Do pdf text files take up a lot of storage? Thanks for the advice... Cary in Houston...