Select the Resources tool from the Tool Menu of your site.
Select Actions, and then select Compress to Zip Archive.
Select the Actions dropdown menuassociated with the folder containing files to compress.
Select Compress to ZIP Archive.
Zip file displays.
The zip file contains a copy of all of the subfolders and files inside the selected folder.
Note: The zip file is named the same as the Resource folder that was compressed. By default, the zip file is placed inside of the root folder of the site.