This app provides a comprehensive test of your SD card. It allows you to check if it is a valid SD card, and if it is, it will give you the information you need to know. So, you can avoid using counterfeit ones.

This app has been designed to help you find out if the capacity of your SD card is as large as advertised. It can also measure read & write speed.

The testing usually takes less than an hour, however, this can vary if the card is slow or enormous. If it is slow, you can leave it running overnight.

This app can also be used to test your phone's internal storage.