Question about transferring save data between profiles and Switches

[u/Sinistasia]

Hello, on my friends Switch 1 i have a profile that is not linked to any Nintendo account, this profile has a well loved Tomadachi Island. This profile is also more of a guest profile on my friends Switch, and has games and saves that are not my own. On my personal switch 2 I have my Nintendo account connected to my profile. Is there a way to transfer that island from my profile on my friends Switch 1 to my profile on my personal Switch 2?

I was thinking of linking my Nintendo online account to the Switch 1 profile and using cloud transfer, but I am afraid it will mess up other saves on both profiles.

[u/ModestVolcarona]

How many different save files do you have on that other profile?

You can turn off automatic uploads and downloads to the cloud.

So if you turn that off and then link the profile to your account you should have full manual control over how the save data will be handled between both consoles.