Mountain Duck 3.1 is now available. It features a default connection profile for NextCloud deployment with the option to share files with other users directly from the Finder or Windows File Explorer.

The changelog is as follows

Mountain Duck lets you mount server and cloud storage as a disk in Finder on macOS and the File Explorer on Windows. Get it from the website at https://mountainduck.io or from the Mac App Store. Many thanks for your continued support!

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Libre FTP, SFTP, WebDAV, S3, Azure & OpenStack Swift browser for Mac and Windows.
https://cyberduck.io/
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Cyberduck for mounting volumes in the file explorer.
https://mountainduck.io
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Cyberduck for the command line interface (CLI).
https://duck.sh/