How to Format a Sandisk Micro SD Card

by C. Taylor

Your SanDisk microSD card unleashes small, personal electronics by increasing their storage capacities. These fingernail-sized cards also allow easy transfer of data between your device and a computer. However, if this data becomes corrupt or you simply want to start over with a fresh card, you might want to format the card. Formatting the card will wipe the card clean and correct many issues that may arise.

Insert the SanDisk microSD card into a microSD card adapter, if your reader does not support this smaller size format. This adapter transforms the microSD card into a standard SD card that is readable by most card readers. When using an adapter, make sure the side lock is in the unlocked position.

Insert the microSD card or card adapter into your computer's card reader. If your computer does not have a card reader, add one by purchasing a USB card reader. These readers plug into a USB port and usually require no additional drivers or software.

Click "Open Folder to View Files" in the AutoPlay window or press "Win-E" to open Windows Explorer.

Right-click the microSD card's drive letter and select "Format."

Click the "File System" drop-down menu and select "FAT32" to enable near-universal compatibility between devices and operating systems. If your card is greater than 32GB, select "exFAT" instead.

Enter a name for your card in the "Volume Label" field, if desired.

Click "Start" and select "OK" in the confirmation dialog.


  • Back up any important data on the card before formatting. After formatting, this data will be unrecoverable from the card.

Items you will need

  • MicroSD card adapter
  • USB card reader