Mobile Privacy Guides / Android / Samsung

Samsung Secure Folder — Setup, Use, and Security Guide

If you own a modern Samsung Galaxy device, you already have access to military-grade encryption in your pocket. But setting up Samsung Secure Folder incorrectly can lead to lost files or false security. Here is exactly how to configure, secure, and recover your most private digital space.

Author Editorial Team
Last Updated October 2023
Est. Time 0 min read
Quick Answer

Samsung Secure Folder is an encrypted space on Galaxy devices protected by Samsung Knox hardware architecture. To enable it, navigate to Settings > Security and privacy > Secure Folder, sign in with your Samsung account, and choose your lock type (PIN, pattern, or biometric). It operates as a completely separate digital environment from the rest of your phone.

In This Guide

Understanding the Architecture: Samsung Knox vs Standard Folders

Data Protection Vault Concept

When you create a standard "hidden" folder on most Android devices, the operating system simply tells the file manager, "Do not display these files in the gallery." The files remain physically accessible on the storage drive to anyone who plugs the phone into a computer or uses a third-party file explorer.

Samsung Secure Folder is fundamentally different.

It utilizes Samsung Knox, a hardware-level security layer. When you move photos, financial documents, or apps into the Secure Folder, Knox encrypts that data using the Advanced Encryption Standard (AES-256). Furthermore, the cryptographic keys used to unlock this data are stored in the Knox Vault—a physically isolated processor on the motherboard that is entirely separate from the main Android operating system.

Hardware Isolated Knox Vault Processor

Key Security Behaviors

1

App Isolation (Sandboxing)

Apps installed inside the Secure Folder cannot see or communicate with apps outside of it. A banking app inside the folder cannot be tracked by a social media app on your main screen.

App Isolation and Malware Shield
2

Phone Restart Lock

If you restart your Samsung device, the Secure Folder remains locked and encrypted until you manually enter your PIN or password. Biometrics (fingerprint) cannot unlock it for the first time after a reboot.

Device Stealth and Restart Security

Method 1: How to Set Up Samsung Secure Folder

Because this feature is built directly into One UI, no external downloads are required. However, you will need an active Samsung Account.

Step-by-Step Setup Guide

1
Locate Settings: Open your app drawer and tap Settings.
2
Navigate to Security: Scroll down and select Security and privacy (or Biometrics and security on older models).
3
Activate: Tap Secure Folder. You will be prompted to sign in with your Samsung account.
4
Choose Lock Type: You must set a primary lock method (PIN, Password, or Pattern). We strongly recommend a PIN of at least 6 digits or a Password.
5
Enable Biometrics (Optional): Once the primary lock is set, you can toggle on Fingerprint access for everyday convenience.

How to Lock Apps in Samsung Secure Folder

Once activated, the Secure Folder acts like a second phone inside your phone.

Locked Photos and Videos in Android Gallery Hide Photos and Videos on Android

Mobile Privacy Settings Audit

Tap to check off essential Secure Folder configurations.

Auto-Lock Setting: Set to "Each time I leave an app" or "When screen turns off" to prevent unauthorized access if you set your phone down.
Hide from Apps Screen: Toggle "Add Secure Folder to Apps screen" OFF to make the folder entirely invisible to casual snoopers.
Reset with Samsung Account: Toggle this ON so you can recover your files via email if you forget your PIN.

Limitations of the Native Method

While highly secure locally, the built-in Samsung feature has three notable limitations:

Background Syncing and Cloud Limitations

The Tool We Recommend for Cross-Platform Privacy

If you need to access your secure files from a Windows PC, an iPad, or simply want to ensure your privacy isn't locked permanently into the Samsung hardware ecosystem, a dedicated encryption tool is the required next step.

Create Secure Wallets on Tablet
AES-256 On-The-Fly Encryption
Windows, Mac, iOS & Android
Dropbox & Drive Integration
Portable USB Lockers
Secure Digital Wallets

Folder Lock 10

Developed by NewSoftwares.net, Folder Lock is a comprehensive data security suite that goes far beyond basic folder hiding. It creates dynamic, military-grade encrypted "Lockers" that secure your data on the fly. Unlike hardware-tied folders, these lockers seamlessly integrate with Dropbox, Google Drive, and OneDrive for automatic backups. You can access your vault across Windows, macOS, Android, and iOS, or even generate self-executable Portable Lockers to carry your secure files on a USB drive without needing to install the software on the guest computer.

Folder Lock Locker Interface
Try Folder Lock Free → View Full Version →

Compare Locking Methods

Samsung Secure Folder (Built-in)

Native OS Security

Best for: Local device isolation, banking apps, hiding photos from friends.

App Lock Protection
  • ✓ Completely free and built into One UI
  • ✓ Hardware-level Knox Vault encryption
  • ✓ Can clone active apps (like WhatsApp)
  • ✕ Cannot be accessed via PC
  • ✕ Cannot easily migrate to non-Samsung phones

Folder Lock (Third-Party App)

Advanced Cross-Platform

Best for: File portability, cross-device syncing, secure wallets, and direct PC/Mac integration.

Portable USB Lockers for Secure Data
  • ✓ Real-time AES-256 military-grade encryption
  • ✓ Direct locker backup and sync via Dropbox, Google Drive, and OneDrive
  • ✓ Native applications for Windows, macOS, iOS, and Android
  • ✓ "Portable Lockers" allow you to securely carry data on USB drives
  • ✓ Includes a Secure Browser, App Locker, and Secure Digital Wallets
  • ✕ Requires a separate software download and installation
USB Flash Drive Security Best Practices

Troubleshooting & PC Access

How to access Samsung Secure Folder from PC

A highly common query is how to view these files on a computer. By design, Samsung does not allow direct USB access to the Secure Folder. If you plug your phone into a PC, the Secure Folder directory is invisible and heavily encrypted.

The Workaround:

  1. Open the Secure Folder on your phone.
  2. Select the files you want to transfer.
  3. Tap the menu and select "Move out of Secure Folder".
  4. Connect your phone to the PC via USB and copy the files from your standard gallery or downloads folder.
  5. Alternative: Use Folder Lock. By creating a Cloud Locker within the app, any photo, video, or document you encrypt on your phone is automatically synced via your preferred cloud provider (like Google Drive) and instantly accessible inside the Desktop Locker on your Windows PC or Mac.
Universal Windows PC Compatibility

Use PIN after restart: Samsung Secure Folder behavior

Many users are confused when their fingerprint suddenly stops working to open the folder. This is a security feature, not a bug. Upon restarting your phone, or updating the Android OS, the Knox encryption keys are wiped from active memory. You must input your Master PIN, Pattern, or Password manually the first time to decrypt the data. Once unlocked once, biometric access will resume.

Recovery: What if I forget my Secure Folder lock?

Failed Access and Data Lockout

Did you enable "Reset with Samsung account" during setup?

Solution: Email Recovery

Enter an incorrect PIN or pattern on the Secure Folder lock screen. A "Forgot PIN" button will appear. Tap it, sign into your Samsung Account, and you will be allowed to reset the lock.

Warning: Data Lockout

If account reset was not enabled, Knox architecture is specifically designed to prevent bypass. There is no backdoor. You cannot crack the folder lock. The only way to use the folder again is to go to Settings > Apps > Secure Folder > Storage > Clear Data. This will permanently delete all files inside the folder.

Digital and Physical Security Questions

Frequently Asked Questions

Setup & Access

Can I access Samsung Secure Folder from another phone?
No. Secure Folder data is hardware-encrypted to the specific device it was created on using the Knox Vault. To move files to a new Samsung phone, you must back them up, transfer them normally, and place them into the new phone's Secure Folder.
Can I have more than one secure folder on Samsung?
No, Samsung only permits one native Secure Folder instance per device. If you need multiple isolated profiles or lockers, you will need to use a third-party application like Folder Lock.
How to use Samsung Secure Folder without a screen lock?
Samsung requires a device screen lock (PIN, pattern, or biometric) to be active in order to use the Secure Folder. You cannot have an entirely unlocked phone while maintaining a Secure Folder.

Security & Knox

Is biometric app locking more secure than PIN?
Biometrics (fingerprint) are highly convenient and protect against "shoulder surfing" (someone watching you type a PIN). However, legally and technically, a strong alphanumeric password is the most secure method against targeted hardware intrusion.
Does app locking work in split-screen mode?
Yes. If you attempt to open a protected app in split-screen or pop-up view on a Samsung device, the OS will blur the screen and demand authentication before rendering the app's interface.

Files & Location

Where is Samsung Secure Folder stored?
The files are stored on the device's internal storage in a hidden, system-level directory that cannot be accessed by standard file explorers. The data is encrypted, meaning even if someone physically removed the storage chip, they could not read the files.
Can I move Samsung Secure Folder to SD card?
No. Because of the strict hardware encryption requirements and the volatility of external storage, Samsung does not allow the Secure Folder to be mounted or moved to a microSD card.
How to add photos to Secure Folder Samsung?
Open your standard Gallery app, select the photos you wish to hide, tap the "More" or "Share" menu icon, and select "Move to Secure Folder." The original photos will be deleted from the public gallery and securely migrated.

Recovery & Reset

How to unlock Secure Folder Find My Mobile Samsung?
Previously, Samsung allowed you to unlock a device via the SmartThings Find (Find My Mobile) website. However, for extreme security, this remote unlock feature does not typically decrypt the Secure Folder environment; you still need the local PIN.
Can someone bypass app lock by restarting the phone?
No. Restarting the phone actually increases security. The Knox encryption keys drop out of RAM during a reboot, meaning the Secure Folder requires the master PIN or pattern to decrypt upon boot-up, rendering bypass attempts via restart useless.
How to recover my Samsung Secure Folder if forgotten?
You can only recover it if "Reset with Samsung account" was toggled on in the folder's settings. If it wasn't, your data is cryptographically permanently locked to protect against unauthorized hacking.

The Bottom Line

Proactive Data Security with Folder Lock

Samsung Secure Folder is arguably the best native security feature built into any modern smartphone, utilizing hardware-level Knox isolation to keep your data safe. For locking banking apps and hiding a few local photos, it is the only tool you need.

However, its biggest strength—hardware isolation—is also its biggest weakness. Because you cannot easily back it up, sync it to a PC, or move the data to a non-Samsung device, it creates a severe risk of data loss if your phone breaks.

For users who need to protect sensitive files and access them seamlessly across Android, iOS, Windows, and macOS platforms, we recommend a dedicated encryption tool like Folder Lock. The free version provides a generous 1GB secure locker to get started, while the Pro upgrade (available for a one-time fee) unlocks unlimited storage, cloud integration, and cross-device syncing for up to five devices.

Try Folder Lock Free → View Full Version Pricing →
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