I recently purchased a SCSI2SD device (version 6) from inertialcomputing.com for my Amiga 3000 and I have to say, it's very impressive. My biggest challenge and the reason why I purchased it was due to my 72G scsi hard disk being really hot and overheating inside the A3000's case. I couldn't do a backup without taking the case off.
Anyhoo so I decided to buy a SCSI to SD converter and popped in a $20 128GB SD card. I was very surprised that the device is powered by the 50 pin scsi connector alone. Really cool.
You can partition your SD card using HDToolbox just as normal. You have to use the windows config utility to set the SCSI2SD device to the size of your SD card. Then connect it to the Amiga and you're off to the races.
It's the same speed as my physical hard disk but it's completely silent and there's no latency when seeking for files. I think you can buy a little enclosure for it but I didn't.
I recommend this doodad to anyone who has a failing hard disk, a hot drive (like myself) or just wants to try something cool. I believe the SCSI2SD works with any scsi 1 and 2 controller on any machine (amiga or otherwise).