I have very simple needs for file hosting and syncing. The files are mostly small text files and documents. And I need to access them from linux, windows and android devices.

Just a simple SFTP account on one of my work servers is probably enough for hosting. I guess the focus is on reliable client side syncing. Changes made the files from clients should sync seamlessly with some basic conflict handling just in case.

Can anyone recommend your current setups and sync clients in use?