@ MontrealCL
Welcome to the Amiga and Amiga.org!
That's the GVP A530 you've got there. I think it's the best peripheral ever made for the 500 during its heyday. Take good care of it - they're very rare now. ;-)
There's a bit of upgrade potential left in it, if you're interested - you can add another 4MB of RAM, swap out the processor for one with an MMU and upgrade the SCSI chip to a slightly faster one.
