S4cmd
S4cmd is a fast and simple command-line tool that lets you move files to and from DiskSpace S3-compatible object storage.
It works like a super-fast file copier that can upload your photos, videos, or documents to the cloud or download them back to your computer with just a few keystrokes.
S4cmd uses DiskSpace S3-compatible object storage as a giant, reliable online hard drive that can hold massive amounts of data safely, so you can sync files between your computer and this secure cloud storage with just a few typed commands.