U-NAS Cloud is an application for managing documents stored on U-NAS. It is a convenient mobile tool for collaborating and sharing files in an efficient way. It allows remote file access through multiple devices and provides the ability for managing files on U-NAS server. It also supports playing audio from the server without downloading the file. U-NAS cloud adopts WebDAV protocol for file transfer. U-NAS server is needed for the full function of U-NAS Cloud.