Check the USB Stick for Viruses
Check the USB Drive Body
Check to Make Sure the USB Stick Isn't Full
Double-Check Drive Permissions
Remove Individual Files With Write Protection
DiskPart Command Prompt Utility
Clear Write Protection Error in Windows Registry
Format the USB Drive
Turn Off BitLocker or Remove Encryption
But I've Got an SD Card
It's important to be careful with USB and SD cards, even if they're in good shape, error-free, and include a write-protect switch. Many of the solutions for fixing write protection on USB drives also work with SD cards. Prior to repairing the USB, double-check that the switch is on.
Check the USB Stick for Viruses Check the USB Drive Body Check to Make Sure the USB Stick Isn't Full Double-Check Drive Permissions Remove Individual Files With Write Protection DiskPart Command Prompt Utility Clear Write Protection Error in Windows Registry Format the USB Drive Turn Off BitLocker or Remove Encryption But I've Got an SD Card