Amazon appears to have a line of Crucial Solid State drives discounted. Solid State Drives (SSD) are required recording media when working with tools like the Atomos Ninja / Blade HDMI Recorder, or with cameras like the BlackMagic Cinema / Production 4K.
I'm working wit a bunch of Sandisk SSD drives, and haven't worked directly with the crucial brand, but it seems to have decent reviews. Available Crucial solid state drive sizes discounted are the 120GB, 240GB, 480GB, and 960GB (found here)
Crucial 120GB / 240GB / 480GB / 960GB Solid State Drives.