This Micro SD card is perfect for any smartphone user looking to expand the storage on their device. I personally am using one in my Samsung Galaxy Note 3. Works like a charm. It is adequately fast, cheap, and fairly reliable. If you are looking for extremely fast speeds however, you should consider the SanDisk Extreme series which are the fastest MicroSD cards in the world. My card came with an adapter that this card plugs into and it becomes a full sized SD card. If you are looking to use this in a camera or any other device that uses SD cards, please look elsewhere. These cards are not nearly as fast as the full sized SD cards used in cameras. The adapter should only be used for transporting data from the phone or other device, to a computer. All in all, these are a great buy for any smartphone user looking for a higher storage capacity. The price fluctuates often, so catch em while there cheep! I got mine for around $30.