The G-Technology 0G10326-1 Atomos Master Caddy 4K is an approved device for use with select Atomos devices. The Master Caddy 4K is a 2TB SSD that is compatible with the Atomos Master Caddy system, but the SSD is not removable, This SSD can go from your Atomos device to an ev Caddy reader. This 2TB version supports transfer rates up to 540 MB/s, which enables capturing 4K video at up to 60fps and HD video at up to 240 fps.