Baidu is the biggest search engine in China. It also provides generous cloud storage service for its user. They offer you 2TB of storage for free. You can register her:

http://yun.baidu.com/

You can work with Baidu in Air Explorer and use his 2TB of free storage. Bear in mind that Air Explorer create a folder named AirExplorer where you will find the uploaded files by Air Explorer. Air Explorer can not access the files outside that folder.