Smartphones tablet pcs ebook readers hand held game consoles and other devices usually have a limited amount of built in storage transcends class 4 microsdhc cards are a cost effective way to expand device memory capacity and store many times more movies music ebooks and app datafeaturesfully compatible with sd 20 standardsonly 10 the size of a standard sd cardsdhc class 4 complianta minimum readwrite speed of 4mbs8gb high capacityeasy to use plug and play operationbuilt in error co