Nate C.
I bought this memory card for my smartphone (Nokia Lumia 521) when my older 8GB micro SD card died on me (amazon basics brand).I threw on some MP3s on there to listen on my phone on my trip up the California coast since I knew some areas wouldn't have any radio or cell phone reception, and had no problems with it.I haven't done any speed tests on it as I'm not using it for anything that needs extreme speeds. Its has more than enough speed for capturing video and and pictures.Its a great deal for the amount of storage and its price.