I actually accidentally bought these chips for a drone with which they were not compatible (the drone had a maximum recording capacity of 32GB) but kept them because I shoot a lot digitally and they will work in my DSLR. I then bought a DJI Mavic Mini, whose instructions specifically state that it requires U3-rated micro SD cards. and they only have a U1 rating. So I bought a U3 card that I bought on duty and eventually put that in the Mini's test case. I had nothing to lose on the site other than trying. I was expecting lags or dropouts or other anomalies. but it seems to pick up my 2.7k/30fps video well. I've been using these SD cards for capturing video and photos in my Canon 5D Mark III DSLR for a few weeks now and they're working great again. I've often seen how much buffering works with older SD or CF cards. Not with these chips. Based on the "specified" requirements for the Mavic Mini, I'll probably buy U3 cards in the future, but these work surprisingly well. I suspect that a drone capturing 4k at a high bitrate would need higher rated cards, but these Sandisk cards seem to work well for me in my current applications. They are a very good buy for the capacity.
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