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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallUse the SD Association’s SD Memory Card Formatter on a computer, and select Overwrite format as Nintendo directs. Formatting erases data, so back up anything you need first. Check your console model before choosing a card: original 3DS-family systems use full-size SD cards, while New 3DS-family systems use microSD cards.
Check your console and card type first
Nintendo’s compatibility guidance distinguishes the original 3DS family from the New 3DS family. The card shape and capacity class must match the console:
| Console models | Card type and capacity supported |
|---|---|
| Nintendo 3DS, Nintendo 3DS XL, Nintendo 2DS | SD up to 2 GB, or SDHC from 4 GB through 32 GB |
| New Nintendo 3DS, New Nintendo 3DS XL, New Nintendo 2DS XL | microSD up to 2 GB, or microSDHC from 4 GB through 32 GB |
Nintendo does not consider SDXC or microSDXC cards compatible with these systems. That remains true even though the SD Association formatter can format SDXC cards. Nintendo also says it cannot guarantee cards other than the one included with the system will work. See Nintendo’s card compatibility guidance for details.
Back up data before formatting or replacing a card
Formatting removes information on the card. The SD Association manual explains that Overwrite format erases the user data area, so copy anything you want to keep before proceeding.
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If you are moving data to another card, copy the entire Nintendo 3DS folder and leave its contents and folder structure unchanged. Keep the original card as-is until you have checked that the replacement works. Nintendo’s SD-card transfer instructions describe the process.
Format the card with the SD Association tool
- Power off the console. Do not remove or insert its SD or microSD card while the system is on.
- Connect the card to a computer. Use the computer’s SD slot or a compatible card reader/writer. A microSD card needs a reader that accepts microSD or a suitable adapter.
- Open SD Memory Card Formatter and select the correct card from its drive list. Check the selected drive carefully so you do not format a different storage device.
- Choose Overwrite format, then start the format. Nintendo specifically recommends this option: “Please select Overwrite format when formatting the card.” The formatter manual notes that it can take considerably longer than Quick format.
- Wait for completion, then safely eject the card. Do not disconnect the card or reader while formatting is underway.
- With the console still powered off, reinstall the card in the appropriate slot, following Nintendo’s instructions for your model. See Nintendo’s formatting instructions and its card insertion instructions.
Formatting a card on a computer is different from formatting the console’s system memory. Nintendo’s SD-card formatting instructions direct users to its recommended computer tool; do not look for a universal 3DS settings menu to format the card.
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- Cards include security feature for protection of copyrighted data
- This is NOT a micro SD card
- SD cards are fully compatible with all SD-compliant devices
- Speed performance rating: Class 4 (based on SD 2.0 Specification)
- Writeable label for easy identification and organization
If the formatter cannot see or write to the card
- The card is missing from the drive list: Confirm that the reader supports the card type, reinsert the card, and refresh the formatter’s drive list. The SD Association manual notes that some systems may require drivers or file-system support for certain card types.
- The formatter reports write protection: On a full-size SD card, move the write-protect switch to the upward, unlocked position. If a microSD card is in an adapter, check the adapter’s switch too.
- Formatting seems slow: Overwrite format writes over the user data area, so duration varies with card size and speed. Let it finish rather than removing the card or reader.
- The replacement card does not show the transferred data: Check that you copied the complete Nintendo 3DS folder without renaming, merging, or changing its contents. Keep the original card until the replacement is confirmed.
- The card is labeled SDXC or microSDXC: Reformatting it does not make it a Nintendo-supported card type. Choose a compatible SD/SDHC or microSD/microSDHC card for the relevant console family.
The SD Association manual referenced here is SD Card Formatter 5.0.3 for Windows/Mac User’s Manual Version 1.11, copyright 2010–2024. Nintendo’s support pages cited above were accessed October 4, 2026; they do not show publication dates.
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- Shot speeds up to 90MB/s, transfer speeds up to 100MB/s (Up to 100MB/s read speed. Write speed up to 90MB/s. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes. X = 150KB/sec.)
- Perfect for shooting 4K UHD video and sequential burst mode photography (Full HD (1920x1080) and 4K UHD (3840 x 2160) video support may vary based upon host device, file attributes and other factors. See HD page on SanDisk site.)
- UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) (UHS Speed Class 3 designates a performance option designed to support 4K UHD video recording with enabled UHS host devices. UHS Video Speed Class 30 (V30), sustained video capture rate of 30MB/s, designates a performance option designed to support real-time video recording with UHS enabled host devices. See the SD Association’s official website.)
- Built for and tested in harsh conditions: Temperature-proof, waterproof, shockproof, and X-ray-proof (Card only. See product packaging or official SanDisk website for more information regarding proof.)
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- SDSDUNR-064G-GN3IN Overseas Retail
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- 32GB SD SDHC Flash Memory Card FOR NINTENDO 3DS N3DS 2DS XL DS DSI & Wii Media Kit. (Not compatible with New 3DS)
- Also compatible with Nikon SLR Coolpix Digital Camera, Kodak Easyshare, Canon Powershot, Canon EOS
- Speed performance rating: Class 10
- Bonus SD/TF USB Card Reader to facilitate easy transfer between devices
- High quality and reliability backed by a 5-year limited manufacturer warranty
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