: Open the RetroBoot_1.2.1_Standalone.zip and drag all contents directly to the root of your USB drive.
Insert your SD card, power on the Dreamcast, and navigate to your file browser or boot directly to the disc image. If successful, you are greeted by the familiar, driver-like interface of RetroArch. retroboot 121 install
: Label the USB drive precisely as SONY (all caps). Use FAT32 formatting. : Open the RetroBoot_1