To copy a folder, simply select the folder and drag it to the folder
list on the other side (other file
panel), dropping it on the destination folder. When the folder is dropped, a popup menu will appear. Simply select "Copy" from the menu. A warning will be displayed prior to overwriting any existing files/folders.
Access: Select a folder in one session. Then drag and drop on top of a folder in the other session. Menu appears when the folder is dropped.