Usb-write-protect

Modern flash drives have a built-in "retirement plan." When the NAND flash memory cells wear out or the controller detects a hardware failure, it often switches to a permanent read-only mode. This is a safety feature to let you save your data before the drive dies completely.

There are three main reasons a drive enters this "read-only" state: usb-write-protect

Some older or high-security drives (like certain SanDisk models) have a tiny physical toggle on the side. If it’s flipped, the drive won't let you write anything. Modern flash drives have a built-in "retirement plan

USB write protection is a double-edged sword: it’s a powerful security feature when it works, but a frustrating "brick" when it triggers unexpectedly. If it’s flipped, the drive won't let you write anything

If the drive isn't physically broken, you can usually clear the protection with these steps: This is the most reliable software fix for Windows users.