My OGG or NBT files wont appear in the import files place, can someone help me?

My OGG or NBT files wont appear in the import files place, can someone help me? No files will appear so I cant import anything. I made a structure, saved it, and moved it to another folder but that folder wont show any files. The same issue happened with my OGG music and sounds, they wont show up! I need help fast this is dumb and annoying. I also cant export my mod file, when it finishes building it downloads but it wont show up anywhere in my files...