Would love to buy DJI select!

DJI Mavic Air filming in 4K problems...?
Hi, I have a DJI Mavic Air drone, and I bought two MicroSD Cards for it, which were supposed to be fast enough for the 4K filming. I filmed in 4K with both cards, but when I copy the footage over to my Laptop, and play it back from my Laptops SSD drive, the video it crystal clear, but 1 to 2 secs in, it slows down, and skips, and goes blurry, sometimes it clears for a split second. Any ideas? I also filmed in 4K to the internal storage on my drone and same thing happens. I’m completely stuck on this one. Please help. I have put two pics of the MicroSD Cards I use too.