I am using Dropbox and the new update will even export pics from drop box into your albums on ipad if you so choose. also it is nice because you can view all the files you need to without taking up space on the ipad. I currently have 2.5gb for free from them so the service for a free service is top notch and easy to sync with multiple computers as well. I save a file at work to my dropbox and can access it anywhere. when I turn on my laptop it downloads instantly. The ipad allows for viewing but if it is a document and you need to edit it and have a program to do so such as numbers it will let you. such a sweet app can't go wrong and its free to boot.