The Cyberduck utility provides a graphical user interface for Windows and macOS. The application can be downloaded from the following website:
Once Cyberduck is installed, download a generic S3 profile from the following URL:
Opening the profile should launch Cyberduck and allow you to edit the following fields:
- Nickname (specify an arbitrary name used to identify this connection)
- Server (enter the endpoint URL of the USS S3 gateway)
Close the bookmark and launch the connection. You'll be prompted for you credentials then should see a listing of all buckets.