Home > Questions

Can't format Samsung 128 EVO microSD card, what to do?

I'm having issues formatting a micro SD card a for a friend on my Mac. I've tried using Disk Utility, diskutil commands in Terminal and SD Card Formatter. I tried using exFAT and still got the same error. What should I do?

Best Answered by

iBoysoft author Ciki Liu

Ciki Liu

Answered on Monday, July 10, 2023


On your microSD card reader or adapter, check if the physical SD card lock is toggled down to protect it from being written. If your SD card is not write-protected but the formatting still fails, possibly, the SD card has some hardware issues. Return it to the manufacturer for some luck.

Method 1. Unlock your SD card physically.

Basically, you can find the physical write protection switch on all standard SD cards. The same applies to your SD card reader. This card lock can be turned up/down to disable/enable the write protection on your microSD card. Therefore, the physical lock should be checked first when you find it unable to format the SD card on Mac.

Step 1. Find the lock button on the SD card adapter that inserted with your microSD card.

Step 2. To disable the SD card write protection, slide the SD card lock up to the unlock position.

Step 3. Connect the microSD card reader to your Mac. Try formatting it now, is it working?

Method 2. Ask for the SD card manufacturer for professional help.

Believe it or not, there are many fake SD cards on the market. Sometimes, even the one you brought on the official website of the manufacturer could have hardware issues. In this case, you can either return the memory card for a new one or go to a nearby manufacturer store for help.

People Also Ask

Read More Questions

Read More Advice From iBoysoft's Computer Experts

Réparer une erreur s'est produite lors de la préparation de l'installation sur Mac

[Ventura] Une erreur s'est produite lors de la préparation de l'installation

7 façons de résoudre l'erreur 'Une erreur s'est produite lors de la préparation de l'installation' lors de l'installation de macOS Ventura, Monterey, Big Sur, Catalina, Mojave, High Sierra, Sierra et OS X El Capitan.

Erreur 'L'installation ne peut pas continuer car le programme d'installation est endommagé' sur Mac

L'installation ne peut pas continuer car l'installateur est endommagé

Si vous essayez d'installer macOS Ventura, Monterey et Big Sur mais que vous rencontrez l'erreur 'L'installation ne peut pas continuer car l'installateur est endommagé', essayez ces solutions.

Solución sin disco para instalar OS X

¿No hay disco para instalar OS X o macOS? Solucionar el problema de que no aparezca el disco

Selecciona el disco donde quieres instalar OS X ¿no se muestran los discos? Aprende las razones detrás de este problema y 7 formas de solucionar la falta de disco para instalar OS X o macOS.