It took a few hours, but I figured it out.
Step 1. Root your Xiaomi (I used this guide: http://www.cnet.com/how-to/how-to-easily-root-an-android-device/), if it says it's already rooted, but it isn't, just re-root it.
Step 2. Install a root file manager
Step 3. Open it, and go to the root...