PS2 - FunTuna (Free McBoot for Fortuna), Page 8

Well you are wrong. Tested that (as has multiple others). I believe there is even multiple comments about it in this thread.

PS2 - FunTuna (Free McBoot for Fortuna)

How To Install PS2 FreeMcBoot Mod + FMCB & OPL Setup (Easy)

Destravamento de PS2 em 2020

Got this memory card and a ps2 slim SCPH 90001. I believe it isn't compatible, right? If so, what can I do to play games in a USB? : r/ps2

The Easiest Way to Install FreeMCBoot on a PS2 Using FreeDVDBoot

The Easiest Way to Install FreeMCBoot on a PS2 Using FreeDVDBoot

New PS2 Homebrew - How To Install and Use OpenTuna Tutorial (2021)

PS2 Homebrew

TONKBEEY Free McBoot V1.966 & Fortuna Card Compatible with PS2 MX4SIO SIO2SD OPL Installed SD Card Adapter for Slim/Fat Console

TONKBEEY Free McBoot V1.966 & Fortuna Card Compatible with PS2 MX4SIO SIO2SD OPL Installed SD Card Adapter for Slim/Fat Console

PS2 - FunTuna (Free McBoot for Fortuna), Page 10

Is my ps2 compatible with fmcb : r/ps2

PS2 - FunTuna (Free McBoot for Fortuna), Page 5

Shop Funtuna Ps2 online

New PS2 Free McBoot Card FMCB v1.966 8M 16M 32M 64MB Memory Card Supports All Consoles Fat and Slim Update OPL1.2.0 For MX4SIO - AliExpress