This usually means the card has bad sectors. Run the "Full (Overwrite)" format again. If it fails twice, run DiskPart (Windows) to clean the disk, then retry SD Formatter.

It overwrites the master boot record and partition table, forcing the card back to a single, usable volume.

Once finished, a "Format Complete" window will appear. The card is now in a clean, factory state. You can now use it in any camera, phone, or game console.

If you cannot find the official 3.1 archive, download the latest SD Formatter from sdcard.org and pair it with a third-party FAT32 formatting tool (like GUIformat) for the same result. But for purists, 3.1 is the one-stop solution.

Even with the legendary SD Formatter, things can go wrong. Here is how to fix them.