If your SanDisk Cruzer USB is write-protected and won’t format, try these fixes:
Check for a lock switch – Make sure it’s off.
Use Command Prompt – Open diskpart, select your USB, and run attributes disk clear readonly.
Edit Registry – Set WriteProtect to 0 in StorageDevicePolicies.
Update Firmware – Check SanDisk’s support page.
Faulty Drive? – If nothing works, the USB may be damaged. Contact SanDisk or replace it.
Did you get an error prompt like ‘Your SD card is locked’? Follow the steps below to run DiskPart command lines to strip the write protection from your pen drive.
Besides, you can also try connecting your pen drive to another Windows computer and changing file permissions in the Properties. Alternatively, use the Registry Editor to disable write protection.
Read also: How to Remove Write Protection from an SD Card