The "Secure Folder" is a password protected area that has its own secure area on the local storage, where you can store sensitive apps or files that can only be opened with a password. The "Secure Folder" feature is pre-installed on Samsung devices with One UI and only needs to be activated, which requires a Samsung account.
- Open the Settings
- Tap on Biometrics and security
- Tap on Secure Folder
- Choose desired lock type
- Tap on Next
- Set up you PIN/Password/Pattern