Note: PS2 USB ports are USB 1.1, which causes slow loading times and potential stuttering in video cutscenes. If you'd like, I can:
Download the latest version from the official GitHub or reputable community sources like PSX-Place. Mcboot Download Usb
Format your USB drive to FAT32 on your computer. Note: PS2 USB ports are USB 1
Extract the Free McBoot files and copy them to the root of your USB drive. Mcboot Download Usb