How do lock memorycard in gfive g9000i phone?

To lock a memory card on the GFive G9000i phone, go to the phone's settings menu and look for the option related to storage or memory card settings. You may find a feature to set a passWord or lock the memory card under security settings. If such options are not available, consider using a third-party app for additional security. Always make sure to back up your data before applying any security measures.