I made a topic not too long ago that was a bit confusing. Some people weren't absolutely sure what I wanted, so instead I thought to make this topic and ask the question in more general terms. I want to transfer (encrypted) SD card data from my 4.2 firmware 3DS XL to my 3DS XL that has the latest firmware. It's as simple as that. Is something like this possible in any way? Maybe with system transfer and then reverting it partially or something, I don't know. I'm hoping someone has tried something like this before and succeeded. Hmm... Okay, let's put it a different way. Do people know exactly what happens when you do a system transfer? Will I be able to restore my 4.2 3DS to normal if I do that? Will there be any adverse effects for my 9.0 3DS?