9103a4d created the issue

For S3 and other providers, "move" and "rename" are expensive and slow for large files such as video files. It would be valuable to have a way to move a file to a new folder and rename it with a new filename in a single step via the GUI.

Use case:

1. User A with limited S3 privileges and technical skill uploads a video file to an upload-only folder with a generic filename.
2. User B must rename move that file to a new S3 location for linking to a website. The filename must be changed to follow a specific naming convention.

Suggested implementation:
One way to accomplish this would be to implement a right-click "Move & Rename" dialog that allowed browsing to a new folder and simultaneously changing the filename.
An even simpler user interface would be to implement a dialog box in which the full path to the file is editable. The user could change the path portion as well as the filename portion, and CyberDuck would attempt to move the file when the user clicks "Save" or "OK" in the dialog.