Use software like WinRAR or 7-Zip to extract the contents, as these handle the .rar format most reliably. How to Use the Extracted Content If the file contains custom songs for the Steam version:
Follow the specific instructions provided by the modding tool you are using (such as the Groove Coaster Chart Editor ). Groove.Coaster.rar
Only download archives from trusted community hubs like dedicated Discord servers or established rhythm gaming forums. Use software like WinRAR or 7-Zip to extract