Twin is the most flexible online backup solution for Mac OS X, compatible with most Internet servers: FTP, FTPS, SFTP, WebDAV, Amazon S3, MobileMe. It even supports offline backups to external drives.
Twin is a true Mac product that preserves Finder info, resource forks, ACLs, Privileges and comes with an elegant user interface and a powerful assistant. It also provides numerous high-end features like AES-256 encryption, efficient bz2 compression, powerful exclusion rules and scheduler, support for splitting large files during network transfers, network-error recovery, individual digital signature for backed up files, multi-cores machines optimization and much more. Twin is the best backup solution for Mac OS X users who already have access to online storage (web hosting, work servers, MobileMe…), or who want to buy their own dedicated online storage (Amazon S3, Bingo Disk, Online Storage Solutions), or even users who simply want more control and advanced features than other backup products allow.