I purchased this Kootion Pro(TF-64G-KT) 64GB SDXC card for use in my Fimi X8 SE 2020 drone, which records in 4k at 30fps at a rate of up to 100Mb (megabit) per second. This card would also work well in all of the Hubsan Zino drones, the DJI Mini or Mavic series and even the Autel EVO II with an 8k camera. It would also be suitable for newer generation dash cams that record in 2k or 4k as well as home security cameras with internal storage via sdxc cards.The card itself is rated to at least 30MB (megabyte) per second. It met that rating without issue when using my Uni USB 3.0 card reader. When using the built-in media reader, it came up short so be aware of that possibility. Your actual speeds may vary based on the specifics of your device. The formatted size is around 58GB. Formatting always uses some of the stated capacity.Also be aware of the difference between MB and Mb as it relates to speed. 8Mb = 1MB, so the 100Mb/sec write speed of the drone in this case will not be an issue as it only equals 12.5MB/sec.All that being said, I also bought and tested two other cards for the same price and one performed much better on writing speeds. That was the Patriot EP (PEF64GEP31MCX).And finally, I always recommend that you format the card in the device that is going to use it whenever possible.
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