Only the current version so far — new entries appear as the app ships updates.
坚果云 is a productivity app by Nutstore with 50,000+ downloads (about 85K estimated). +162 installs in the last 7 days. Rated 4.1 from 1.4K ratings. Released Jul 11, 2011. Install growth, rank history, SDKs and ad networks.
From the store listing: “国内最安全、稳定的云盘,可以自动下载文件到手机或者平板上,也可以自动备份手机照片到云端,随时随地访问您的数据”