SCSI2SD is a board which replicates the functions of a SCSI hard disc, and can be used as a direct replacement for any situation which would normally require a 50-pin SCSI hard disc, or even a 50-pin ST506 controller board, being connected to it, using a micro SD memory card to store the data which would have been on the disc. It's a Godsend for people like me and I've made extensive use of SCSI2SD since my two boards arrived here in November 2015. I do hope you will click on the picture links above to learn more.