I mainly shoot in 4K 60P, but I wanted to use a card that supports 400Mbps C4K in the future. I received four cards (256GB) for two of my GH5s. The card works as expected. Recording time with 256GB = 1 hour 23 minutes at C4K (400 Mbps), 3 hours 43 minutes at 4k 60P (150 Mbps). Just for fun I took some RAW photos at 12fps and there was no glitches at 100 photos. This is a truly amazing card for the price! Update: 10/16/2020 All 4 cards still work perfectly, I had no problems. Don't jump on the fence looking for something better, that's all.
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