VaultSync is an open source desktop application for backing up selected folders and project files to local drives, external disks, and network storage. It creates manual or scheduled snapshots and restore points, then provides integrity checks and recovery evidence so users can assess whether stored data is usable. The app is intended for folder level backups and does not replace full disk imaging software. A typical workflow involves selecting folders, choosing a storage destination, creating backups, verifying them, and reviewing available recovery points before restoring files. VaultSync includes presets for development tools and creative workflows, such as Unity, Unreal Engine, .NET, Python, Blender, and video production. Presets exclude common generated or disposable files, and users can review or customize the rules. The application supports Windows, macOS, and Linux. It can use SMB network shares, including automatic mounting on Windows and macOS with credential profiles; pre-mounted NFS destinations are also supported, though automatic NFS mounting is not available on macOS. VaultSync is open source and does not require an account, subscription, or proprietary storage service. Direct Windows and macOS builds are currently unsigned and may display operating system security warnings.