I ran into an issue where the original CFExpress card I purchased -- a ProGrade Digital 128GB CFexpress 2.0 Type B Gold -- wouldn't allow me to record 1080p 120fps, let alone 8K RAW video (it would stop recording after a few seconds). I had originally planned to get a Delkin Devices 128GB BLACK CFexpress Type B but found an ebay deal on a used Delkin Devices 128GB POWER CFexpress Type B (I paid about $100) and thought I'd give it a shot. It's allowed me to record high framerate 1080p video and 8K RAW without a hiccup and I've been very happy with it. If I hadn't found the deal on the Gold (a lesser-tier) card, I'm sure I would have been happy with the Delkin Black series card which, at this time, has 46 5-star reviews (no reviewer has rated it for less than 5 stars).