The problem might be connected to the firmware version of the card reader device. A while ago I purchased a similar drive and it turned out to formerly be used in a self service photo printer machine. The firmware version in my device enables read operation, only. The Mac seems to be able to use only a storage device in the PCMCIA slot of the card reader, not in any other card slot. Also it is not cooperative regarding any attempt to boot a Mac from, so far. Some person was so kind to provide a firmware flashing software to me that should allow to make the drive read and write operational. However, this software needs to be used in a SCSI equipped Windows PC. Despite I found an old Pentium machine with SCSI host adapter in my collection, I did not find the time to flash the firmware, yet. If someone is interested in trying this firmware flashing tool p.m. me, please.