= Windows Access Denied Errors on USB = {{{ HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies Step 3. Double-click the WriteProtect key and change the value to 0. If there is not writeProtect key, you can create a new one and set its value to 0. reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies" /v "WriteProtect" /t REG_DWORD /d "0" /f }}}