CMD RAMLink

The RAMLink was one of several RAM expansion products made by Creative Micro Designs (CMD) for Commodore's C64/128 home computers. The RAMLink was intended as a third-party alternative, successor and optionally companion to Commodore's own 17xx-series REU RAM expansion cartridges.
Unlike the REU, the RAMLink is externally powered and designed from the ground-up to act as a RAM disk.