Formatting SD (Windows)


Para suporte em Inglês, peça ajuda em Nintendo Homebrew no Discord.
If you appreciate this guide, we accept Donations.

Required Reading

This is an add-on section for formatting an SD card to work with the 3DS.

If the 3DS already recognizes the SD card, this guide is not required.

Esta página é destinada apenas a usuários do Windows. If you are not on Windows, check out the Formatting SD (Linux) or Formatting SD (Mac) pages.

What You Need

  • For SD cards 32GB or smaller: the latest version of SD Formatter
  • For SD cards 64GB or larger: The latest version of guiformat

Instructions (32GB or smaller)

  1. Insira o cartão SD no seu computador
  2. If the SD card has any files and folders on it, copy everything to a folder on your computer
  3. Run SD Card Formatter Setup (the .exe file) in the downloaded .zip file with Adminstrator privileges, then install the program
  4. Run SD Card Formatter from the Start Menu
  5. Select your SD card’s drive letter for “Select card”

    Make sure you choose the correct drive letter, otherwise you might accidentally erase the wrong drive!

  6. Enter anything for “Volume label”
  7. Ensure that “Quick Format” is selected
  8. Click “Format”
  9. Click “OK”
  10. Wait for the format to finish
  11. Click “OK”
  12. Close SD Card Formatter
  13. If the SD card had any files and folders on it before the format, copy everything back from your computer

Instructions (64GB or larger)

  1. Insira o cartão SD no seu computador
  2. If the SD card has any files and folders on it, copy everything to a folder on your computer
  3. Run guiformat.exe
  4. Select your SD card’s drive letter for “Drive”

    Make sure you choose the correct drive letter, otherwise you might accidentally erase the wrong drive!

  5. Select a size for “Allocation unit size”
    • If the SD card is 64GB, choose 32768
    • If the SD card is larger than 64GB, choose 65536
  6. Enter anything for “Volume label”
  7. Ensure that “Quick Format” is selected
  8. Click “Start”
  9. Click “OK”
  10. Wait for the format to finish
  11. Click “Close”
  12. If the SD card had any files and folders on it before the format, copy everything back from your computer

Common Errors using guiformat

  • Failed to open device: GetLastError()=32
    • Close everything that may be using the SD card, such as any File Explorer windows.