File lock is the best security application on the android market. If you are looking for a simple, secure, and user-friendly application, you should try this app. 

It is a simple, user-friendly, and secure application that can be used to lock your files and photos. This app is useful for people who want to hide their photos and videos from others. You can also use this app to hide your personal files, photos, and videos from friends.

How to use this app?

To use this app, you need to set a PIN, pattern, or fingerprint. You will be able to access your files and photos with the same password. You can set the password to be a simple number or a complex password.

To access your files, you need to enter the correct password.