SpiderOak provides an easy, secure and consolidated free online backup, storage, access, sharing & sync* tool for Windows, Mac OS X, and Linux (Ubuntu, Debian & Fedora). SpiderOak offers a different approach to online backup, synchronization, and sharing. This difference is not just measured in our zero-knowledge privacy policy - the first one ever employed in this setting - but also in our flexible design in handling data from all platforms (Mac, Windows, Linux) and locations (external drives, network volumes, USB keys) in one centralized account.
A Sync may exist between any two or more folders including two folders that exist as part of the same machine (e.g. between a desktop and an external hard-drive)
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