Question: how to transfer nintendo switch save data to micro sd card?
Answer: You'll first need to turn your Switch off. Hold down the power button until this screen pops up. ... 
Select Power Options.
Select Turn Off. ... 
Insert your microSD card into the Nintendo Switch console. ... 
Turn on your Switch. ... 
Select System Settings from your Switch's Home screen.
Select Data Management. ... 
Select Manage Software.