I'm sure there's some kind of sd card transfer you can do. I just found this on nintendo's website, i'll copy and paste it here:
How to Transfer Data Between SD Cards or microSD Cards
Applies to: New Nintendo 3DS, New Nintendo 3DS XL, Nintendo 3DS, Nintendo 3DS XL, Nintendo 2DS
Step-by-step instructions on how to transfer data from one SD Card to another SD Card.
Notes:
Copying data to the SD Card or microSD Card of a new system will not allow you to use the copied content on that system. If you wish to transfer content to a new system, click here for instructions.
Do not swap between multiple SD Cards, or swap your SD Card between multiple systems. Use one SD Card with one system and be sure to follow the steps below if transferring content to a new SD Card.
Do not use save data from an old card after transferring.
Do not overwrite data by recopying to the same SD Card.
Do not click into the folder titled "Nintendo 3DS" to locate specific files. Always copy the entire folder, and never alter or erase the files it contains.
What You Need:
Two compatible SD Cards, SDHC Cards, microSD Cards, or microSDHC Cards.
An SD Card slot on a PC or Mac or a commercially available SD Card reader/writer.
If you are using a microSD Card or microSDHC Card, you will need an adapter if your PC or Mac does not have a microSD Card slot.
If you are removing the microSD Card from a New Nintendo 3DS XL, you will need a size #0 crosshead screwdriver.
What to Do:
The New Nintendo 3DS XL has a feature that allows you to access SD Card data over your home network. Considering using this alternative method to transfer content if you do not wish to remove the microSD Card from your system, or if you are unable to remove it. How to
Remove the SD Card from the system. How to
Insert the SD Card with the Nintendo 3DS data into the SD Card Slot or the SD Card reader/writer.
Open Windows Explorer (for PC) or Finder (for Mac) and access the SD Card.
Highlight the data and drag it to the desktop. If performed as part of a system transfer, drag all folders to the desktop as they appear. Do not click into folders and drag their contents - drag the entire folder.
If you are moving your content to a new SD Card, be sure you have formatted it per our recommendations. How to Once it has been formatted, move all content to the new card per the instructions below. Do not delete, format, or alter the content on the original SD Card until you have verified the new SD Card is working correctly.
If you are moving videos or photos, then only move the desired content.
Eject the first SD Card.
Insert the second SD Card into the slot or reader/writer.
Using Windows Explorer or Finder access the SD Card again.
Drag the data from the desktop to the new SD Card.
If you recently performed a system transfer and chose to delete the data on the target system's SD Card, choose to copy and replace for duplicate folders or files. It is very important that you replace the folder titled Nintendo 3DS on the target card. Do not merge or duplicate this folder.
If you recently performed a system transfer and chose not to delete the data on the target system's SD Card, but you still wish to transfer your content to it, then you will need to copy its contents to your PC or Mac and then format the card. Do this before dragging content from your old card to the new card. How to
