GamerCore
Android Enthusiast
The Honor 5X is one of a handful of Android devices that supports micro SD card expansion. That means, even with limited internal storage, you can easily add up to 128GB in storage to the device (for storing apps, games, or other media) by inserting a simple micro SD card.
The micro SD card slot is actually on the same tray as the SIM 2 slot (the bottom one). Just insert the SIM removal tool or small paper clip to pop the tray out, and insert your micro SD card as shown in the image above. Insert the tray back into the phone, and you're all set.