Memory cards play a crucial role in recording and storing your precious memories. Though your device may have some built-in memory, it won't be enough and you will also need larger memory cards if you are looking at shooting high-resolution images.
In computing, DDR3 memory stands for Double Data Rate type three memory. It is a type of memory often used in computers and other electronic devices. It has been in use since 2007. DDR3 memory is neither forward nor backward.