You can do either that - OR (with a 4shared account, of course) change /folder/ to /dir/ in URL (ease of navigation, as well as error prevention), select all (or as much as 3GB worth of selections, in this case you need two of those), and then click to download as ZIP (be glad for that, long ago ZIPs were premium-only and free users were forced to use the unpopular "proprietary" B1 archive shite)
Then wait for the temporary archives to finish packing (you'll receive a notification), and lastly go to those archives' pages and copy/paste their URLs to one of those sites above (which, as you already noticed, don't support folders
)
Windows is shutting down