Review on 📷 Gigastone 128GB Micro SD Card with [5-Yrs Free Data Recovery]: Ideal for Nintendo-Switch, GoPro, Action Camera, DJI. Supports 4K UHD Video & R/W up to 100/50MB/s. UHS-I U3 A2 V30 C10 by Carl Durant

This card tests about 50MB/s write, 90+ MB/s read with Blackmagic Disk Speed test but when running in Insta 360 One X is used, it crashes after about 14 -20 minutes. Recording at "speed too low". This camera records two files simultaneously at around 6MB/s each, but recording something else at the same time prevents the Gigastone from delivering the results it promised. After trying to contact customer service: no support available. They contacted me, asked what resolution I was recording the video in, then fell silent. A star. For the same money you can buy a solid brand.