Data.RSDK is a file used by the game to store its data, such as levels, characters, and graphics.
You can also try searching for a direct download link for Sonic Mania Plus and Data.RSDK. However, be cautious when using direct download links, as they might be or outdated . sonic mania plus data.rsdk download
To download Sonic Mania Plus and the Data.RSDK file, you'll need to follow these steps: such as levels