Mountain Duck lets you mount server and cloud storage as a disk in Finder on macOS and the File Explorer on Windows. Open remote files with any application and work like on a local volume. View all files on your remote storage regardless if synced to your computer. Files are synchronized to your local disk when opened to allow offline usage.

Select files and folders to always keep offline on your computer. Other files are downloaded and cached on demand only and otherwise do not take space on your local disk. Changes are uploaded in the background as soon as a connection is available. Status icons indicate sync progress.

Runs in the status bar on macOS or the system tray on Windows with sync progress, file history and connection management. Sync options at your fingertip with context menu in Finder and File Explorer.