I'm trying to do a system transfer due to dsiware downgrade. From o3ds to n3ds. The source 3ds has a bigger sd than the target, and nintendo gives me 3 options:

Complete wireless transfer, limited wireless transfer and pc transfer.

All of them work? Can I do limited wireless transfer, redownload fieldrunners on target 3ds and downgrade or will I lose the hacked save?

 

I would recommend using the PC transfer.
Backup both sd cards to somewhere on your computer then proceed to downgrade using the "PC Transfer" method. When prompted to move DSiWare game do so and it'll tell you to move the source sd card to the target 3ds. Then just proceed with the downgrade process as normally it won't matter the source is bigger than the target because you'll be using the source sd card until you've fully finished hacking the target 3ds and you can leave it in the afterwards if you like


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