AP Vault in Xiaomi: hidden storage for confidential data – how it works and why you need it

If you own a Xiaomi, Redmi or a smartphone POCO base MIUI 12-14, you may have noticed a mysterious section in the security settings AP Many users confuse it with Secure Folder (from Samsung) or standard Hidden Space in the U.S. MIUI, But it's actually a separate tool with unique features. AP Vault: How it differs from other “secret” repositories, and why it should (or should not) be used to protect personal data.

We'll mark it right away: AP Vault is not just a folder for hiding files, but a full-fledged isolated profile with a separate desktop, applications and even a full-fledged file. SIM-It's designed to create a "second life" on a phone -- for example, to separate work and personal data or hide sensitive information. MIUI, And then, in the firmware region, even the smartphone model.

What is it? AP Vault and how it came to be Xiaomi

AP Vault (from the English Application Processor Vault - "app processor storage") is a technology of hardware data isolation, first introduced in the field of computer technology. MIUI 12 for Xiaomi flagship models, originally marketed as a solution for enterprise users, but later became available in mass-market smartphones Redmi and other popular models. POCO.

Unlike other software solutions like Hidden Space, AP Vault works at the chipset level: data is encrypted hardwarely (using TrustZone in Qualcomm Snapdragon processors or similar technologies in MediaTek), which means that even if an attacker gains root access to the main system, they will not be able to easily extract data from Vault.

Interesting Fact: Some Firmware for the Chinese Market AP Vault is called (lit. "secret safe"), and in global versions MIUI It may be called Second Space (though it's not exactly the same thing:

• 🔒 AP Vault – Hardware Storage with Processor Level Insulation (not available on all models).
• 📁 Hidden Space – software hiding files and applications (in all cases) MIUI).
• 🌐 Second Space – a separate user profile (analogue of “Guest mode” in Android).

In 2023-2026, Xiaomi began to actively integrate AP Vault is in mid-range and premium smartphones, but it is often absent or limited in budget models. e.g. Redmi Note 12 Pro+ Vault supports duplication SIM-maps, and in POCO X5 Pro - no.

Differences AP Vault from Hidden Space and Second Space

The main confusion arises from the fact that MIUI There are three tools to hide data, and we're going to look at the key differences in the table:

AP Vault is advantageous in that its contents are not visible even when connecting the phone to a PC (unlike Hidden Space, which can be detected through the file manager:

• 📱 Create a full-fledged second profile with unique settings, wallpapers and applications.
• 🔑 Use a separate password or fingerprint to log in (even if the main screen is unlocked).
• 📶 Some Xiaomi models 13/14 redmi K60 — duplicate SIM-card to call from Vault without changing profile.
• 🔄 Quickly switch between the main space and Vault via the notification curtain or security settings.

However, there are limitations:

⚠️ Attention: Annexes to AP Vault works independently of the main profile, which means that if you install WhatsApp in both spaces, you will have two separate accounts with different chat rooms!

💡

If you just need to hide a few photos or apps, use Hidden Space – it’s easier to set up and doesn’t require hardware support.

What Xiaomi models support AP Vault

Unfortunately, AP Vault is not available on all Xiaomi smartphones. Here is the current list of models (as of 2026) where the function works exactly:

• 📱 Xiaomi 12/12S/12T/13/13T/14 (All modifications, including Pro and Ultra).
• 📱 Xiaomi MIX 4 and MIX Fold 2/3 (folding-model).
• 📱 Redmi K50/K60 Series (including Pro, Gaming and Extreme Edition).
• 📱 POCO F4/F5 Pro and POCO X5 Pro 5G (just global firmware).
• 📱 Black Shark 5/5 Pro (gaming smartphones).

On budget models (Redmi Note 12, POCO M5 below) AP Vault is usually missing, but may appear after an update before MIUI 14 or HyperOS to check support on your device:

1. Open the Settings. → Password and security.
2. Scroll down to the Privacy section.
3. If there's a point AP Vault or Second Space (AP) — function.

If there is no section, but your model is in the list above, try:

• 🔄 Update MIUI Up to the latest version through Settings → The phone. → Updating the system.
• 🌍 Switch to global firmware (if you use Chinese or European firmware).
• 🔧 Enable Developer Mode and check the settings there (sometimes Vault is hidden).

⚠️ Note: On smartphones with MediaTek Dimensity processors (for example, Redmi Note 12 Pro)+) AP Vault can run unstable due to hardware encryption limitations, in which case Hidden Space is better used.

How to set up AP Vault: step-by-step instructions

If your smartphone supports you AP Vault, you can set it up in 5-10 minutes:

Make sure your phone is at least 50 times charged%|Connect to Wi-Fi (you will need to download it) ~100 MB of data)|Create a separate password for Vault (not like the one on the main screen)|Remember the answers to the control questions (they will be needed for recovery)-->

Step 1. Activation of Vault

1. Go to Settings. → Password and security → AP Vault.
2. Click Create Vault (or Set Up).
3. Accept the terms of use (please note the item on resetting data when you repeatedly enter the password incorrectly).
4. Enter a password (minimum 6 characters, we recommend 8 characters)+ lettered).
5. Set a question for recovery (e.g., “Mother’s maiden name”).

Step 2: Set up the biometrics

After creating Vault, the system will offer to link:

• 👆 Fingerprint (if the sensor supports multiple profiles).
• 👁️ Facial recognition (works only on flagships with the 3D-scanner).

⚠️ Important: Vault biometrics are set up separately from the main one! If you use a print to unlock your phone, you'll have to add it again.

Step 3: Data Transfer

Now we can:

• 📲 Install applications from Google Play or MIUI App Store specifically for Vault (they won’t be visible in the main profile).
• 📁 Transfer files through Files → AP Vault (they will be copied and the originals will remain in place).
• 📞 Set up duplication SIM-maps (if the function is supported) in Settings → SIM-maps and mobile networks → AP Vault SIM.

Step 4: Switching between spaces

To move to Vault:

• 🔄 Swipe down the screen and click the icon. AP Vault in the notification curtain.
• 🔐 Or go to Settings. → Password and security → AP Vault → Come in.

Security AP Vault: How reliable is the storage

AP Vault is one of the most secure solutions in the world. MIUI, But it has vulnerabilities. Let's look at the pros and cons:

Advantages:

• 🔐 Hardware encryption: data is protected at the processor level, it cannot be extracted without a password even through the processor. ADB or TWRP.
• 🚫 Isolation from the main system: applications in Vault cannot access the main profile data (and vice versa).
• 🔄 Fast Switch: No need to reboot your phone, like Second Space.
• 📵 Secrecy: When connected to a PC, Vault does not appear as a separate drive (unlike Hidden Space).

Disadvantages and risks:

• 🔧 Dependence on firmware: on custom ROM (For example, LineageOS Vault may not work.
• 🔄 No backup: If you forget your password, your data will be lost forever.
• 📱 Limited support for models: on budget smartphones, the feature is often missing.
• 🔍 Vulnerabilities in older versions MIUI: into MIUI 12–13 were bugs that allowed you to bypass the lock via Safe Mode (in the MIUI 14 and HyperOS, they're fixed).

For maximum safety:

⚠️ Warning: Do not use simple passwords (e.g. 123456 or date of birth) and attackers can use a dictionary attack to find them if they gain physical access to their phone.+ symbols.

We also recommend:

• 🔄 Update regularly MIUI (New versions are closing vulnerabilities).
• 📵 Disable debugging by USB In the developer settings, if you do not use it.
• 🔐 Do not store your password in notes or cloud services (e.g. Google Keep).

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AP Vault is more reliable than Hidden Space, but inferior to specialized solutions like Samsung Knox or Apple Secure Enclave. For most users, its protection is enough, but for storing critical data (for example, bank passwords), it is better to use separate safe applications.

Frequent problems with AP Vault and their solutions

Despite the reliability, users are faced with bugs AP Vault. Here are the most common problems and the ways to solve them:

If your problem is not described above, try:

1. Restart your phone in Safe Mode (press the power button → Restart in Safe Mode).
2. Clear the application cache Security in Settings → Annexes → Application management.
3. Reverse to the previous version MIUI via Fastboot (if the problem has occurred after the update).

For complex cases (for example, if Vault is blocked after a failed rooting), you may need to contact the Xiaomi service center.

Alternatives AP Vault for Xiaomi users

If your smartphone does not support you AP Vault or you need additional features, consider these alternatives:

• 📁 Hidden Space (MIUI) — It's a built-in solution to hide files and applications, easier to set up, but less secure.
• 🔐 Second Space is a separate user profile (similar to "Guest mode" in Android) suitable for separation of work and personal data.
• 🛡️ Safeguard applications: KeepSafe - to hide photos and videos. AppLock - to block individual applications (FOSS) — Open source application isolation through Work Profile.
• 📱 Dual messengers – Dual Apps function in MIUI Allows you to clone WhatsApp, Telegram and other apps without creating a separate profile.

Comparison of alternatives:

| Decision | Level of protection | Root is required. | Support SIM | Backup |

|------------------|----------------|---------------|--------------|----------------------|

| AP Vault | ⭐⭐⭐⭐⭐ | No. | Yes* | No. |

| Hidden Space | ⭐⭐ | No. | No. | Yes (by hand) |

| Second Space | ⭐⭐⭐ | No. | No. | Yes (partially) |

| Shelter | ⭐⭐⭐⭐ | No. | No. | Yes. |

| AppLock | ⭐⭐ | No. | No. | No. |

*Only on selected models (see list above).

For most users, the Hidden Space combination + Dual Apps covers 90% of data separation tasks. AP Vault is worth using if you need it:

• 🔒 Maximum protection (e.g. for storing working documents).
• 📱 Duplication SIM (if the model supports).
• 🛡️ Virus isolation (Vault applications cannot infect the host system).

FAQ: Answers to frequent questions about AP Vault