A visual inspection can reveal a surprising amount of information about the physical state of your equipment. Many SD cards feature a physical sliding switch on the side of the card.
Understanding and Disabling Write Protection on Your SD Card
Write Protection Another frequent reason for an SD card suddenly becoming "not working" is the accidental activation of write protection. Operating systems rely on specific protocols to recognize storage, and when these protocols encounter corruption, the card may appear "not working" or unreadable.
This sudden failure often feels like a digital catastrophe, but in many cases, the data can be recovered and the issue resolved. File System Corruption Abrupt removal of a card while data is being written is a primary cause of file system corruption.
Check and Fix Write Protection on Your SD Card
Ensure this switch is in the unlocked position. If this switch is locked, the card becomes read-only, and any attempt to save or delete files will fail.
More About Why my sd card not working
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