Error code 2002-1002 is displayed while starting a game or while downloading software on Nintendo Switch.
If a microSD card is inserted on the console, the save location will default to the microSD card when downloading or redownloading software.
What to Do:
Ensure your console has the latest system update.
If the console is already up to date, restart it by holding down the POWER Button for three seconds, then select "Power Options" > "Restart."
Check for corrupt data.
Delete the problematic software and redownload it.
If the issue persists, try the following:
Reseat the microSD card by removing and reinserting the microSD card.
Format the microSD card.
Once formatted, the information on the microSD card cannot be recovered. If screenshots or videos are stored on the microSD card, be sure to first back up the information on a computer.
If downloadable software was saved to the microSD card, it can be redownloaded using the same Nintendo Account where it was purchased
Use a different microSD card.
Remove the microSD card and download the software directly to the system memory.
Situation Not Resolved:
If the error persists with multiple supported microSD cards, or when downloading directly to the system memory, the Nintendo Switch console will need to be repaired.
If you would like further assistance with the Nintendo Switch console, please contact Nintendo Customer Service.