Drag and Drop behavior to and from Box Drive
The current behavior of dragging and dropping content between Box Drive and the local desktop is a "move" action on Windows, and a "copy" action on Mac. A "copy" action may be more intuitive, and will be similar to the behavior when dragging to and from the web app.
Performing a "copy" action would also be better for retaining the original file in case of any issues.

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Sara Hannigan commented
The current behavior of dragging and dropping content between Box Drive and the local desktop is a "move" action on Windows, and a "copy" action on Mac. A "copy" action may be more intuitive, and will be similar to the behavior when dragging to and from the web app.
Performing a "copy" action would also be better for retaining the original file in case of any issues.