Ask HN: Best Way to Store Files in the Cloud Without Third-Party Sync Apps?

I recently lost a lot of data due to issues with my cloud provider, so now I’m looking for a more reliable way to store files in the cloud—something that includes automatic backups but doesn’t rely on third-party sync apps like Dropbox, Google Drive, or OneDrive.

I have multiple server computers that need to upload and download files reliably, preferably using standard protocols (SFTP, WebDAV, rsync, etc.) rather than a dedicated syncing client. Keeping the data at home isn’t an option, and I don’t want to have to think about it—I just need to know my data is safe.

Ideally, the solution should:

- Allow direct access from multiple machines

- Support automatic backups (whether for individual files or full disk images)

- Be cost-effective and scalable in terms of storage size

- Not require installing proprietary syncing software

What are the best options for this?