scp4.zip is a release file of the Minecraft map Survive Create Prosper 4 - Spawn Island, made for Minecraft 1.16.5. It was published on January 22, 2021 and is 44.5 MB in size. For the full description, screenshots and every other version, visit the Survive Create Prosper 4 - Spawn Island map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.