I’m planning on transferring data and I know that pretendo has issues with that and was wondering, if I switched from pretendo to Nintendo network, will that solve my problem and I can safely transfer data with no worry? Can modded consoles have proper save data transfers? I’d like to know everything about this since I’m sure making a mistake could wipe a lot of important stuff from my saves and possibly brick my console(s). Thanks.
As far as I know, it should be safe if you’re connected to Nintendo. The 3DS Hacks Guide FAQ mentions that it will work as long as the second console already has CFW. I don’t think your Pretendo friend code or PNID will transfer over, but I could be wrong on that.
If you’re not sure, it’s always recommended to back up your saves with Checkpoint and take a NAND backup first, just in case something goes wrong.