Cyberduck is a libre server and cloud storage browser for Mac and Windows with support for FTP, SFTP, WebDAV, Amazon S3, OpenStack Swift, Backblaze B2, Microsoft Azure & OneDrive, Google Drive and Dropbox. You can install Cyberduck from https://cyberduck.io/download/
Configuring Cyberduck to access your VPS Cloud+ Object Storage is simple. Open Cyberduck and click on “Open Connection”. Select Amazon S3 from the drop-down list and enter the access details. Refer the below figure for entering the access details correctly. Click on Connect when done.
Cyberduck Configuration View
Cyberduck connects to your VPS Cloud+ Object Storage and loads a tree view of your buckets and objects as seen in the below figure.
Cyberduck Tree View
For advanced features, refer Cyberduck How-to S3.