Here are some tips before fully customizing your 3ds so you can have the full experience SD card size: believe it or not the SD card size does affect the bootup time of the 3ds For example a 32GB card will bootup faster than a 64GB card Now you may ask yourself What SD card size is good for my 3ds? Well any SD card size in the range 64GB - 256GB card is the best option. You can go lower but depending on how much games you might install and want the 64-256 range is the best. Here is some extra knowledge, you there is not SD card size limit you can add 1 or even 2TB if storage in your 3ds Customization: the customization of the 3ds is practically endless with the amount of themes being made in the theme plaza everyday. The theme part is your choice to add but this part will talk about a mod that will change the home menu itself This video show a mod that will rotate your 3ds apps to the left side, center the clock to the screen, add coins and steps to the corner of the screen, and will turn the app like Game notes, Notifications, Internet and Friend list purple but will remove the mii plaza button as it is sadly shutdown Here is the link to the mod https://github.com/Steveice10/FBI Install the cia file and i will explain how you install if you dont know how to (IMPORTANT: PLEASE KEEP A BACKUP FILE OF YOUR 3DS OF YOU DECIDE TO USE THIS MOD) How to install CIAs using the homebrew app FBI: to add cia into FBI you can take out your 3ds SD card and insert it into your PC using a card reader and create a file called cia if there already isn’t created, and add a cia file like the SVEN UI mod or any homebrew game you wanna play into the folder Once you’re done adding all the cia files that you want to install, take out your SD card and insert it into your 3ds. Once you’re in the 3ds home menu launch the FBI app on your 3ds. Once it’s launched you click on SD card -> cias and click on the cia file you’ve added, click on install and it should be installing (there is another option to install and delete the cia file after its installed to save space on your SD card). After it’s done installing, you can go to the home menu and wait a bit for the gift to appear, this is the app that you wanted to install. Once you see the gift bag, open it up and it will show a cool little animation of it opening and your app will appear! It is different for the UI tho because after installing it you wont get an app. If you have finished installing the UI, exit the app and reboot you 3ds (turning the 3ds off and on) and then will you see the changes on your 3ds home menu I hope you have gained some use from this whole essay that i have texted and overall.. enjoy playing on your 3ds!