How do I add backkdrops, sounds and costumes when modding snap!

I am trying to mod Snap, but I can’t add costumes, backdrops or sounds in the source code
Are there any solutions to this?

Sorry, this thread was rushed

I think in each media folder (e.g: backdrops folder) there’s a .json file; you have to edit that file for the image to show in :snap:

thanks for the help.