The Best File Sync Software. Resilio Sync (free, with paid options) I just started using this application, Resilio Sync. This app provides peer-to-peer file synchronization which can be used for private file storage, backup, and file sharing. This also means your files are never stored on a single server in the cloud!   https://www.resilio.com/sync-reviews/ Sync is like DropBox , but 100% private.    Sync makes it easy to store, share and access your files from just about anywhere. Best of all, Sync protects your privacy with end-to-end encryption — ensuring that your data in the cloud is safe, secure and 100% private. Share your own files absolutely free with  Sync.com Why Sync? ✅  GDPR compliant ✅  HIPAA compliant ✅  Zero Knowledge privacy ✅  end-to-end encryption