Mountain Duck mounts servers and cloud storage as disk drives on your desktop.

With Smart Synchronization, files are synced to your local disk when you open them, so you can continue working even offline; once the device reconnects to the network, changes are automatically synced in the background. You can open remote files with any application and edit and manage them just like files on a local disk.

With Finder, you can quickly transfer files to remote servers. You can also choose which files and folders should always remain on your local machine for offline access.

Other files are only downloaded and cached when needed, so they do not permanently take up local disk space. With a compatible Cryptomator encryption vault, you can also encrypt data at rest, reducing the risk of unauthorized access regardless of the server or cloud storage infrastructure.

Mountain Duck supports a wide range of major protocols and cloud storage services, allowing you to connect to almost any server, including FTP, SFTP, WebDAV, Azure Cloud Storage, Amazon S3, Google Cloud Storage, Google Drive, Dropbox, Backblaze B2, and OpenStack Swift.