Micro Sd Card

How to purchase right Micro SD Card for the electronic gadgets?
Nowadays the electronic gadgets such as smart phones, dash cam, GPS, drone, Camera and tablets are in increasing demand for storage space, the minimum capacity they need is 16GB or 32GB at least, many users are still feel the space is limited. However, even they use these devices with 64GB embedded storage, the electronic gadgets is filled up with too many apps, videos, pictures or games. As they store more personal data or multimedia content, and barely do any deletion due to their rising demands. Moreover, some electronic gadgets don't have spaces for extra data, the inside storage is just for loading its system files.