How to Fully Erase an SD Card. If you use your device's SD card to store images, audio files, documents and even email messages, your SD card might contains files that are hidden.

The Computer interface opens, listing the SD card as a removable drive. Right-click on the SD card entry in the Computer interface and choose "Format" in the context menu.

The best way to clear an SD card is to format it, which is like hitting a factory reset button; it'll erase every file, leaving just an empty card.

If you can't delete files from an SD card on your Windows 11/10 computer, check the physical lock switch, remove write protection, etc.

NOTE: If you are inserting an SD card for the first time on your Galaxy Tab A 8.0 (2019) and its file system is not compatible or unreadable, your tablet will prompt you to format the card first.

If you have an SD card that you want to use for a new project or system, or one that’s receiving errors, learn how to format an SD card on Mac.