So I have been downloading maps for mc because I was bored and I wanted to play something. Some maps downloads I came across were files which would not work when put in a folder (RAR is a proprietary archive file format that supports data compression). So I wanted to find an alternate option to downloading 7zip (IDK if its safe). I have windows so I can go to the windows store and I browsed through and found a good working one called RAR Opener and I selected the option to open it. I do suggest using this for if u want to make a server but the map download is a RAR file