Hello! i would like to make a PNG/JPEG Nextbot. the problem is that it isn't showing up in the addons Folder. but it's in the right place!

D:\SteamLibrary\steamapps\common\GarrysMod\garrysmod\addons that's where it should be, while it isn't where it should be. i mean like i can't find it. can the owner of the Nextbot help me how did he do it?
thank you.