You say protocol alternative, but assuming you're more concerned with AWS as the host than S3 as the protocol you might try https://github.com/minio/minio https

You say protocol alternative, but assuming you're more concerned with AWS as the host than S3 as the protocol you might try https://github.com/minio/minio https://github.com/minio/minio If you do feel an aversion to the protocol then the rclone backend list would be a good starting point https://rclone.org/overview/ https://rclone.org/overview/ I like recent (v3) SMB over the network personally.