As media playback formats increase the need for faster MicroSD cards has increased. With 2K/4K video playback and burst mode (Continuous still images on on DSLR cameras) older MicroSD cards just can't keep up with todays needs. Face it most people going into your local mass merchandise store looks at MicroSD cards and the lowest price highest capacity is usually what ends up in the shopping cart. Often those are Class 4 MicroSD and only required to run at 4 MB/s minimum which is a pretty abysmal speed by today's standards, only recommended for up to 720p playback. Fast forward to today's 2K/4K needs and you will need to go to UHS class 10 running at 45 MB/s read 10 MB/s write which is still pretty slow on the write end of flash storage (HD and Burst Mode Photography but not 4K/2K). If you don't mind spending a dollar or two more you can get a UHS-I Speed Class 3 (U3) that runs at 90 MB/s read 90 MB/s write and fully capable of supporting 2K/4K playback.

Kingston has long been known for their memory products including microSD. If you are looking to increase the speed of that new DSLR camera or playback 2K/4K video you will be hard pressed to find a better or faster Micro SD than the Kingston 32GB UHS-1 U3 microSDHC card. Running at 90 MB/s read and 80 MB/s write.