Ok - here's the specs : PIII 700 MHZ, 384 MB ram, 40 GB HD, NEC ND3500AG DVDRW connect via external IDE to USB 2.0 enclosure and pcmcia USB 2.0 cardbus. When I try and burn DVD's with nero or decrypter - I notice the device buffer dropping off a lot (as if DMA wasnt enabled if it was a IDE device) but since its USB 2.0, DMA obviously isnt there. For eg. when I burn at 2x, the buffer usually stays at around 94% but every few mins takes a dive to zero and climbs up again. This has caused a problem sometimes when viewing the movie on a standalone player. It gets worse at 4x - the buffer jumps up and down during the whole burn. Now when I read (or decrypt) from a DVD, the seems to be no speed issues at all. The notebook only has one usb 1.1 port but I use a pc card that has usb 2.0 ports on it, plus the drivers for the card are installed and does list the enhanced host controller with usb 2.0 mass storage device in device manager. I am trying to figure out what is causing the device buffer to drop off like that - I was thinking there might be a problem with the USB 2.0 speed and maybe its only working at usb 1.1 transfer rates but I'm not sure even how to go about testing that speed. Anyone run into a similar problem or have a suggestion?