Rclone

A command line tool that moves and synchronizes files between local disks and more than seventy cloud storage providers, with rsync style copy, sync, move, mount and check commands. It verifies checksums, preserves timestamps, resumes interrupted transfers, and can move data from one provider to another without staging it on local disk.

Administrators use it to script backups, migrate a directory out of a provider, or expose remote storage as a mounted drive or over WebDAV.

Scheduling it on your own server keeps credentials and data transfers under your control, with scripted copies for backups and no vendor metering.