A free app for Android, by ZDevs.

The ZArchiver Cloud Plugin allows you to upload files to and get them from a variety of cloud storage services using this plug-in. Here are some plug-in supports: WebDAV protocol, Dropbox, 4shared.com, box.com, Yandex Disk, Mail.ru Cloud, FTP / SFTP / FTPS protocols. This is an app that serves like an additional storage for your files. You can also name them so it will be easier for you to find the files once backed up.

Additionally, the ZArchiver app must be installed in order for the ZArchiver Cloud Plugin to function. As a standalone software, it is inoperable. You don’t need to download this, if you aren’t asked to.