Review on 📱 SAMSUNG 256GB MicroSD Evo Memory Card with Adapter - 100MB/s UHS-3 (MB-MP256GA/AM) by Thimothy Purnell

. A window appeared on my phone saying the card is TOO SLOW to use for internal storage. That should be U3. I uninstalled it and installed a 32GB Samsung card which I had with a U1 rating. The phone accepted it with no problem and it became part of the phone memory. I don't know if this card is defective or what but I am returning it as defective in order to get a refund from Revain.