When FMCB freezes up with your USB disk connected, it can mean that your USB disk is not compatible or has a problem with it's filesystem. You can try to run a disk check on your disk with Windows.
Originally Posted by threamcloud
If nothing changes after the disk check, you can assume that it's a problem with the USB drivers that FMCB has.
If you cannot get OPL to behave properly with the USB device, you may opt to try PS2ESDL, which was designed for USB devices: http://psx-scene.com/forums/f253/pla...-ps2esdl-63375
USB device compatibility and performance may be slightly better, but it depends on your hardware and the games you play.
Unmodified SCPH-77006 with SM 3.6
SCPH-39006 with M-chip modchip, SCPH-10281 NA and refurb Seagate 80GB HDD
SCPH-10000 v1.00 with SCPH-10190 PCMCIA NA and SCPH-20400 HDD unit