I’ve been using this 256GB microSD card with my drone (Ruko U11Mini 4K RC3), and it has performed flawlessly so far. The card was recognized immediately, and recording 4K video has been smooth with no dropped frames or errors. Formatting the card was very easy through the drone's controller. When the controller displayed the red notification indicating the SD card was unformatted, I simply tapped it and the process completed quickly without any problems. Transfer speeds have been consistent, and reviewing footage feels fast and responsive. The included adapter and USB reader are a great addition. I especially like that the reader supports both USB C and USB A connections, which makes it convenient to use with newer devices as well as older laptops. The build quality of both the card and reader feels solid. The reader fits securely in ports, and the compact design makes it easy to carry along with my drone gear. Overall, this has been a dependable and convenient storage solution for high resolution photos and 4K video.