Knoxite Repository
Microsoft Azure
DropBox
SSH
You can use multiple storage backends, even parallely: local disks, Dropbox, Amazon S3 & others
knoxite cleverly de-duplicates your data before storing it and supports multiple compression algorithms
You can always extend your storage size or move your stored data to another machine
knoxite is free software. Contribute and spread the word!
knoxite uses AES-encryption to safely store your data