Retroboot 121 Install Site
This usually means the USB drive isn't getting enough power or the label isn't "SONY." Try a different USB drive or a powered hub.
RetroBoot 121 is not designed for the bleeding edge. It thrives in the "middle age" of hardware—machines from 2010 to 2016 that have been discarded by modern corporations as "too slow." The installation requires the user to identify a target machine, typically a repurposed business laptop or a generic desktop tower. retroboot 121 install