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How to Lock or Unlock an SD Card on Nintendo 3DS Family

Nintendo 3DS

In this article, you'll learn how to adjust write-protection for an SD Card.

Note: microSD cards are not lockable.

What to do

Set the lock slider to locked or unlocked.

Write protection switch being highlighted on the left side of an SD Card
  • The down position will enable write-protection, locking the card.
  • The up position will unlock the card, enabling you to save and erase data on the card.

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