It sounds like you might be dealing with unauthorized access to your accounts. First, secure your accounts by changing your passwords immediately and enable two-factor authentication (2FA) wherever possible (Facebook, Instagram, Google, etc.). Check the account activity or login history in your settings for any suspicious activity.

For your photos and important files, consider using a secure cloud storage service like Google Drive, iCloud, or Dropbox, but make sure to enable strong security features like 2FA. Alternatively, storing files on an encrypted external hard drive could give you more control if you're worried about third-party syncing. Always back up your important files and keep your devices secure.