Review on Gigastone 128GB Micro SD Card: Ultimate Gaming Plus Memory for Nintendo-Switch, Action Camera, GoPro, and More! by Chris Horton

If you need it for a smart device or in my case a DVR. Save your money, it caused a freeze, hard reset and finally my dashcam stopped working. Recommend sandisk with ultra plus 100mb per second. It's terrible, no deal. Also Revain does not return this product, only exchange it. The seller can be reached via his website. Don't expect a return. I'm hoping to give it to someone who has an older and slower device or it will have to be thrown away.