I have an HP pavilion ze4400 notebook, AMD Athlon XP-M 2400+, 256MB ram, which uses the o2micro OZ6912 Cardbus Controller. I have an SIIG USB 2.0 CardBus Dual PC card (JU-PCM222) (NEC PCI to USB Enchanced Host Controller (B1)). Windows XP Professional with Service Pack 1. External Maxtor 5000LE USB2.0 80GB harddrive. Writes to the external drive proceed at 0.34 MBytes/sec (far slower than USB1.1). Reads from the external drive are about 10 times faster, but still far, far short of USB2.0 performance. I have updated the BIOS twice, and have uninstalled and reinstalled the drivers for the pcmcia controller and the USB hubs and controller. I even tried a different make of USB 2.0 CardBus card. No improvements were seen at any point. Surely other owners of this notebook have run into similar problems, but HP Support doesn't seem to know anything about it. Does anyone have a fix or patch or driver or hardware change or setting change to make this thing run as fast as USB2.0 ought to run?