Nintendo Switch and Nintendo 3DS cartridges use NAND flash for storage , not mask ROMs. Like all Flash memory, they "leak" charge over time and eventually lose data.
The Switch and 3DS card reader tells game cards to "refresh" themselves periodically. https://gbatemp.net/threads/nintendo-switch-3ds-cartridge-lifespan.591607/
But, some users are reporting cartridges already dying, especially ones they haven't used for years. I wonder which of mine already don't work.
Just a reminder that you don't own any data you can't back up. Buying physical cartridges and game cards isn't enough if they're using technology that inevitably deteriorates over time.
I've seen multiple posts through the internet about…
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