Open Settings
Tap Biometrics and security
Tap Secure Folder
Sign in with your Samsung account
Set up a lock method
Open Secure Folder
Tap Add apps
Select the apps you want to lock
Tap Add
Use Secure Folder to open the locked apps
To hide Secure Folder, open Quick Panel
Tap Secure Folder
Tap the three dots
Tap Customize icon
Turn off Show on Apps screen
Use App Lock from a third-party app if Secure Folder is not available
Install a trusted app lock app from Play Store
Set a PIN, pattern, or password in the app lock app
Select the apps to protect in the app lock app