I currently use Sync.com…and it works phenomenally with Windows. Problem is, it doesn’t work at all with Linux.
My primary use case is hosting my second brain with Obsidian.md and not paying $10 for sync. So, obviously, I’d like to continue file sharing and/or cloud storing without having to pay extra.
What are some options available that are compatible with both?
Up vote for Hetzner. Your data, on your own instance, fully compatible with Linux. In a privacy friendly jurisdiction.
You can SFTP or Rsync data across or just add a WebDAV mount to your file manager to use it seamlessly.
If you want a fancy pants gui with automation there is Duplicacy.
Many options. Begin with Hetzner hosting.