Owners of Xiaomi, Redmi and POCO smartphones often face the need to hide from prying eyes personal photos, documents or correspondence. The standard shell of MIUI and its modern version of HyperOS offer built-in protection mechanisms that do not require the installation of third-party software. Locking a folder can mean both a complete hiding of files in the system storage and setting a password to access a specific conductor application.
In this article, we will discuss all the available ways to isolate data: you will learn how to use the built-in Hidden Files tool, how to set up biometric protection and what alternative methods are available for maximum privacy. Data security in today's world is becoming critical, and the correct setting of your smartphone is the first step to protecting your personal information.
Don’t underestimate the risks of third parties accessing the device, whether they are friends, colleagues or detractors who have gained access to an unlocked phone. Xiaomi’s.HiddenFiles system folder encrypts data and makes it invisible even when you connect your smartphone to your computer in file transfer mode. This creates an additional layer of protection that is difficult to get around without a password from your Mi Account.
Built-in “Hidden Files” function in Explorer
The easiest and most reliable way to hide a folder on Xiaomi is to use the regular Explorer tool, which not only hides the folder icon, but moves files to a secure part of the file system, which requires confirmation through a pin code, a pattern lock or a fingerprint, which is ideal for those who want to hide photos and videos without installing unnecessary programs.
The process of activating this feature is as simple as possible by the developers of MIUI. You don't have to search for complex settings in the depth of the menu, just open a standard application for managing files and perform a few simple actions in the interface, after activation, your media files will be securely encrypted.
It's important to understand that files placed in a hidden folder stop showing up in the gallery and other applications, and they only exist inside the secure conductor container, and if you decide to reset your phone to factory settings without first retrieving it, the data may be lost.
☑️ Checking before hiding
To get started, open Explorer on the home screen. At the top of the interface, you'll see the "Recent," "Category," and "Folders" tabs. To activate the hidden mode, swipe your finger from the bottom up through the central area of the screen (where the file list is displayed) and hold your finger for 2-3 seconds, and a password field will appear.
When you first start, the system will suggest you create a separate password or use the one that is used to unlock the screen. It is recommended to choose a complex pattern lock. After setting the password, you will see an icon of the folder with the key, access to which is only possible through the same swipe procedure.
⚠️ Warning: Forgotten passwords from hidden files are extremely difficult to recover without being tied to Mi Account.Make sure you remember the account details to which the smartphone is linked.
Configure access through Application Protection
If your goal is not to hide files, but to deny access to an entire application (such as a Gallery or File Manager) where important folders lie, use App Protection, which allows you to set a password to run any program, an approach that is effective when you need to quickly restrict access to content without moving files.
This feature is built into the Security system application (a green lightning icon), which allows you to flexibly configure access rights, you can choose which applications will require authorization when you launch, which creates an additional barrier for the curious.
To set up, go to Settings → Applications → Application Protection. Here you will see a list of all installed programs. Activate the switch in front of the desired application, such as Gallery or Explorer. The system will immediately request password setting or biometrics.
Using biometric security makes it much faster, because you don't have to enter a password every time, just put your finger on the scanner, or look at the front camera, but you have to remember that biometrics can sometimes be bypassed (for example, by a sleeper owner), so it's better to use complex digital code for critical data.
The app protection menu also has the option to “Hide Content” that, if activated, will not show text or caller name when a call is incoming or notified from a secure application, which helps to keep privacy even on a locked screen.
The combination of hiding files and blocking apps creates a layered security system. Xiaomi allows you to flexibly combine these tools depending on your needs.
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Use different passwords to unlock the screen and to access hidden files, which will prevent you from accessing secrets if someone learns your master code.
Use of the Second Space for Insulation
One of the most powerful features of MIUI is Second Space, which is actually creating a second independent profile on one device, and you'll have two desktops, two galleries, two sets of applications, and two different folders with files, and you'll switch between them instantly through a password or a fingerprint.
This is ideal if you want to separate your personal life from your work life completely, or hide entire categories of apps, and in the second space, you can set your wallpaper, your Google account, and your security settings, and for an outsider, the phone will look like a normal device with a minimum of apps, unless they know a special way to switch.
To activate this feature, go to Settings → Second Space → Create Second Space. The system will suggest setting up a separate password or fingerprint to log in to this mode, and once created, you can transfer any files there or download the applications again.
| Parameter | Hidden files | Application protection | Second space |
|---|---|---|---|
| Level of secrecy | Tall (files are invisible) | Medium (icon visible) | Maximum (separate interface) |
| Difficulty setting up | Low. | Low. | Medium |
| Impact on memory | Minimum | Absent. | Requires data duplication |
| Speed of access | Quickly (swipe) | Quickly (print) | Instantly (print) |
Using Second Space requires more memory resources, as some system data is duplicated, but it is the best defense against those who can gain full access to your phone, and even if an attacker unlocks the main space, they will not know that the second profile exists.
And all of the techniques that I've described in the Second Space also work, so you can create hidden folders in the second profile explorer or you can put protection on the applications, and that creates a security effect.
⚠️ Note: Deleting the Second Space will permanently delete all the data stored inside it.
What happens to the notifications in the second space?
Third-party applications for folder encryption
Built-in tools are sometimes not enough, especially if you need specific functionality, such as creating fake system errors when you try to hack. There are many safe apps in the Google Play store that can block a folder on Xiaomi with advanced features.
Popular solutions like AppLock or Calculator Vault disguise themselves as harmless utilities. The calculator, which is actually a file storage, is a classic example of social engineering in data protection. Nobody will suspect that your personal photos are hidden behind the standard calculator interface.
When choosing third-party software, pay attention to access rights. Many of these applications require full device administrator rights, which is necessary to block the removal of the safe application itself, but it also means that the developer has wide access to your system.
The advantage of third-party apps is that you can encrypt specific files on the fly, and you can take a photo directly through the camera of this application, and it will immediately be encrypted, bypassing the general gallery, which is convenient for working with sensitive documents quickly.
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Third-party apps give more cloaking features, but built-in MIUI tools are more reliable in terms of stability and no advertising.
Working with files through a computer
Many users try to find hidden folders by connecting the phone to the computer through the USB. Xiaomi’s standard folder with hidden files usually has a name.hidden_files Or a similar system prefix that makes it invisible in normal browsing mode, but a power user can enable the display of hidden files in Windows.
Files inside the folder are often renamed to.mi or no extension at all, making them unreadable without a dedicated decryption key stored in a secure area of the system, and simply copying them to a PC will give you a set of broken files.
To transfer hidden files to your computer, you must first extract them from the hidden folder through the smartphone interface, only after that they will adopt the original format (JPG, MP4, PDF) and become available for viewing on other devices.
If you use cloud services, be careful: some conductors may try to sync hidden folders unless you set exceptions, which can leak data to the cloud, which may be easier to access than the phone itself.
Restoring access and solving problems
The most common problem is a forgotten password. If you have a complex combination and haven't used it in a long time, the probability of error is high. Xiaomi has a recovery mechanism through Mi Account, but it only works if the phone has Internet access and you remember the username / password from the account.
If you have five failed password attempts, you will see a Forgot Password button on your screen, and if you click on it, you can reset your account, and if your account is unlinked or forgotten, it's almost impossible to restore access to hidden files without resetting the entire phone, which will result in data loss.
Sometimes a hidden folder can disappear after a firmware update, a rare bug that is usually solved by re-activating the concealment function in the explorer, and the system simply forgets to display the icon, but the files remain in place.
⚠️ Warning: Hard Reset removes hidden files without recovery. Always extract important data before flashing or selling your phone.
Can I recover files after resetting?
Check your hidden data regularly, open the folder once a month, check the files and close it, which will help you remember your password and make sure that the feature is working correctly after the next update.
Using cloud backup for hidden files in Mi Cloud is controversial, on the one hand, it's about protecting against losing your phone, on the other, storing intimate photos on third-party servers increases the risk of leakage when you hack the cloud, and decide for yourself what matters most to you.