SanDisk Ultra microSD 64 GB 140MB/s
The SanDisk Ultra microSD 64 GB (UHS-I, up to 140MB/s read) is a solid mainstream upgrade for Android phones/tablets, Windows laptops that support microSD, and everyday media capture. It also carries an A1 app-performance rating for faster app loading, but it is not positioned for heavy, continuous write workloads like logging or database use.