Miofive Memory Card - Ultimate Micro SD Card with USB 3.0 Type-C Card Reader 170MB/s, C10, U3, A2, V30, 4K for Dash Cams, Android Smartphones, Tablets, and Gaming Devices (256GB)

works fine and the card reader is solid

This is a 256gb Micro SD card with a USB C adapter. The card works great in my dash cam & the included card reader makes it easy to transfer video to my computer.

Description says SD card is ultimate, exceptional, enhanced, and impressive. There are 235.5GB available on the 256GB card. I have no means of testing the speeds. Card indicates a bus speed of XC I. That's not ultimate. You need to have at least XC II for a read speed of 170 MB/s and a write speed of 150 MB/s. Of course, the package and description states "up to" those speeds. Any reading under 170MB/s and 150MB/s is therefore legitimate for their claims. It could be 10 MB/s and they'll be honest. But it won't be ultimate or any synonyms. There's also USB 3.0 which isn't as ultimate as USB 3.2. The reader cannot "satisfy all your daily needs" like the description says. It works in my laptop. It worked in two out of four phones. The reader is too wide by the USB-C. Only a thin phone case will allow it to be inserted. There's a clicking mechanism so the card doesn't fall out. Blue lights indicate when the reader is working. This reader/card performs all of its functions. However, it won't readily operate in any device, and it doesn't deserve superlatives.

After 1 month of use in a Miofive S1 dashcam, the dashcam tells me to "use a high speed card" every few minutes. Reformatting the card did not fix the problem. Restarting the dashcam did not fix the problem. Bad quality. Deserves zero star.