I have made a parent control setup on my 3DS and tried to get access to it with this tool. And yes it hot access so I can confirm that this tool is for real and that it works!
This is something for The Netherlands only so this message will be in Dutch!
Join StreetPass Nederland ons doel is om zoveel mogelijk Nederlandse Nintendo 3DS bezitters te gaan verbinden en StreetPass evenementen te gaan organiseren!
https://www.facebook.com/groups/445912118790094/...
When you restart the transfer I guaranteeing it will reduce you're chance of getting you're data back because the data on you're Wii is removed during the first transfer and if you restart the transfer nothing will be moved and you can't do a transfer anymore (1 transfer a system).
Good luck...
Contact Nintendo they must be able to fix it! When I had trouble with my 3DS they returned the data and I got a free game. (I came with a freezing one and they replaced it with a 3DS with a broken card slot (Loads games. In the game first button touch: Freeze. Then all my data was lost! Waited 2...
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day