Rear 3rd USB port mod I did : r/PlaystationClassic
Playstation Classic USB Ready Games Download (32gb) from Arcade Man - Arcade Punks
PlayStation Classic Hacking: You can now load any PS1 game you please through a USB pen drive! (without even modding your console's files) - Wololo.net
Sony PlayStation Classic Hack Lets You Run Games From USB | Redmond Pie