In Bucket Explorer, a tree structure is displayed on the left panel. This panel is where you can navigate the entire file system. The image below is a screen shot on how it really looks.
Two arrow icons are given right wards, which gives privilege of
. Arrow heading towards right allows upload and arrow heading towards left is for downloading the selected file(s)/folder(s).
Right click on any file/folder.
To know more about these options, refer to this link-
Right click options on local files and folders.