You can find the original USB Advance application archived on public forums and file-sharing sites. USB Advance - Internet Archive This is a reliable source for the base USB Advance files. USB Extreme (Modified Version)
To use these loaders, you generally need a "soft-modded" PS2: How to Play PS2 Games From a USB Usb Advance Ps2 Free Version Download LINK
With a USB device, you can store multiple games, making it a more space-efficient option than storing numerous DVDs. You can find the original USB Advance application
is an older homebrew application that allowed playing PS2 games from a USB drive. However: you can store multiple games