If privacy is a big concern you could try using an encrypted disk image/folder inside Dropbox, OneDrive, iCloud Drive, or similar. Then put your data inside tha

If privacy is a big concern you could try using an encrypted disk image/folder inside Dropbox, OneDrive, iCloud Drive, or similar. Then put your data inside that. That is probably less overall headache than self-hosting just about anything. It gives you the sync reliability of something like Dropbox while securing your data so they can't see it. If you are using Macs then an encrypted disk image is secure and free. But it isn't supported on iOS or Android or any OS that's not macOS. There's also third-party tools like Cryptomator or Boxcryptor that will do the encryption. If you need broader platform support check them out. Good luck!