This is a set of 12 sample disks and 1 system OS disk for the S-50. They have been carefully stored, but as the Roland S-50 keyboard is discontinued, I am selling them as is. I cannot confirm that they can be read, so please understand that they are non-refundable and non-returnable (NCNR). If you have any questions or would like to negotiate the price, please feel free to leave a comment. ^ - ^