I received a FirmTek installation disk from OWC. I think that I had to update the software before installation. The instructions for installation of the card and drives were incompetent and contradictory. Insertion into the card slot is tricky because of the weakness of the slot detents, and the card rebounds out of the slot if pressed too hard. In addition, the power lights on the card never did come on, making it hard to determine if it was installed properly. I believe that in the end after installing the drivers I had to reboot with the card in the ExpressCard slot for it to install properly. Once the icon for the card showed up in the status bar, I then installed the drives. If you are having getting the drives to be recognized, before attaching them, make sure that the drives are on and spooled up. Once everything is installed, I found it best to shut down the computer with the drives on and connected, rather than trying to eject them. On restarting, I find it best to have the card and drives connected to the computer and spun up before booting up. Once all the initial kinks were worked out and I was absolutely rigorous in following my start up and shut down procedures, everything worked as smooth as silk and very effectively, for about six months.