On this page, you will find more information about the most common causes and most relevant solutions for the Switch error '2002-3500-2002-3999'. Do you need help straight away? Visit our support page.
The Nintendo documentation indicates that error code '2002-3500-2002-3999' is caused by the following problem: "A MicroSD error has occurred while playing a game powering the Switch on (or waking from sleep mode)".
Do you think there is another cause for this error? Let others know in the comments.
We've created a list of solutions which you can follow if you want to solve this Switch problem yourself. Do you need more help? Visit our support page if you need professional support with Switch right away.