Huawei P8 Lite - Manual (Page 9)

Highlights
5
Adding files to the safe
1
On the home screen, touch Files.
2
Under Categories or Local, touch Safe.
3
Enter the password, and then touch Done.
4
Touch Add.
5
Follow the onscreen instructions and select which files you want to add to the safe.
6
Touch Add to add the selected files to the safe.