RefinementSited site

There is a site, you need to refine the form of kuzovnoy-volgograd.ru/kal... . 1. The "Delete Files" button doesnt work - you need to fix it. 2. For some reason, some files are not loaded (skai-2_white.jpg - not downloads, but
Volkswagen-Tiguan... jpg - downloads,although have almost the same weight.) 3. While downloading some files, its an endless download-you need to add the option to cancel the download (cross icon or something like that) 4. You need to increase the limit on the amount of one file downloaded to 5MB. Write the cost and timing of the execution.