Secure Folder is where you can keep those photos, video, files, apps, and data you want to keep private. It's an encrypted space leveraging the defense-grade Samsung Knox security platform, protecting your important information from malicious attacks. You can also add an additional biometric lock (Iris and Fingerprint), pattern, password, or PIN to keep it safe from prying eyes.
To use Secure Folder, first set up a Samsung account. Then go to Settings > Lock screen and security > Secure Folder. Tap to open it then log in with your Samsung account. Your Secure Folder is now ready. Open the Secure Folder and at the top there's a menu with the options to lock, add apps, add files, and edit apps to let you move and arrange important files and apps. Afterwards, you can tap on the ADD button at the bottom of the Secure Folder to add more apps. To move your files such as images, go to Gallery, choose the image you would like to move and tap 'Move to Secure Folder' within the More section that's represented by three vertically aligned dots. To move documents or other files in My Files, open My File and choose Documents. Then go to the More section (three dots) and tap edit. Select the documents from the list, tap More icon once again and tap on 'Move to Secure Folder'.
Secure folder is available on Galaxy S9, S9+, Note8, S8, S8+, S7 edge, S6 edge+, S6 edge and S6.
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* Availability may vary on other Galaxy models.