how to import nested css and js of big templates?

I am trying to recreate a template built on bootstrap (Metronic) the problem is that , it has so many nested files for css and js files. there are also some fonts which i learned that we can't import right now. importing many files is possible but i can't drop them in a specific folders. also i need to move them one by one if i droped them in the main folder. any help will be appreciated

You can create folders within each of the sections (Style, Javascript, Images, etc.)

Once you have those folder created, right click over the folder and choose import. Now choose all the images you want to put in there and it will import them all at the same time rather than one by one. No moving necessary.