Owners of Xiaomi, Redmi and Poco smartphones often face a situation where important text entries made in a standard application suddenly disappear from the general list. This does not always mean a system failure or deletion of data. Often users are simply unaware of the existence of special sorting mechanisms, such as the folder “Deleted” or “Hidden” mode, which are activated by individual gestures.
MIUI and the new HyperOS shell have their own unique features in organizing security files. The standard interface does not always display paths to secure data, requiring the user to perform specific swipes or enter a privacy password. In this article, we will discuss in detail where such data is stored, how to visualize it and what to do if standard search methods do not work.
Recovery requires understanding the logic of how the Android file system works in conjunction with the manufacturer's add-ons, and we'll look not only at software methods for searching through the interface, but also at the file structure where the notebook databases physically reside, which will help you understand how the security system works and successfully find the hidden folder.
Principles of operation of the MIUI and HyperOS security system
Xiaomi’s privacy protection features are built on isolating data from the main interface, so when you hide a note, it doesn’t just hide visually, it moves to a secure part of the storage that is only accessible after authorization, ensuring that even when the screen is unlocked, an outsider won’t see the content without knowing the access code or the pattern.
The hiding mechanism works at the application database level. In normal view mode, the system simply filters records with a specific flag. However, if you use the "Second Space" or "Guest Mode" feature, the search logic changes, because the data may be in a completely different user profile, and it is important to distinguish these states so that you do not search for files where there are no physical ones.
It’s worth noting that synchronization with Xiaomi Cloud or Google Keep can create duplicates or hide local copies if the filtering is incorrectly configured. Understanding whether a copy is stored on the server or in the device’s memory is critical to successful search. Sometimes a “hidden” folder turns out to be just an archive in the cloud service.
⚠️ Note: Note-hiding is not a full file system encryption, provided root rights and access to application files are available (/data/data/com.miui.notes) The data can theoretically be extracted.
⚠️ Warning: Resetting settings to factory without prior synchronization will result in the irretrievable loss of all hidden and normal notes, as they are not stored in the default system backups.
Find hidden and deleted notes through the interface
The easiest way to find a missing record is to use the app's built-in navigation tools. The Notes interface hides the extra menus behind simple gestures. To access the archive of deleted files, you need to open the app and find the menu button, which is usually located at the top of the screen.
A different algorithm is used to access hidden notes: In the list of all entries (list viewing mode or tile), you need to make a long press on any free area or swipe down until a special indicator appears, and then the system will request the privacy password that you set when you first set up the security function.
- 🔍 Open the Notes app and click on three dots in the corner to call the menu.
- 🗑️ Select Deleted to find files that were deleted less than 30 days ago.
- 🔒 Pull the note list down with your finger to trigger the password entry window for hidden folders.
If the standard swipe doesn't work, maybe the display settings have "Headers Only" enabled or folder filtered. Check if the restriction on displaying only certain categories is worth it. Also make sure you're not in Second Space mode, where the set of notes is completely isolated from the main profile.
⚠️ Note: Deleted notes are stored in the basket for exactly 30 days, and after this period they are deleted automatically and cannot be restored by standard means.
Use of the “Second Space” function and profiles
One of the common causes of data loss is the activation of the Second Space function, which is a full-fledged second desktop with its applications and data. If you created a note while in the Second Space and then switched to Main, you won't see that record, because it's physically in another memory partition.
To check this, you need to go to the system settings and find the partition that is responsible for special features or additional settings, there is a switch between spaces, and the entrance to the second space can also be protected by a separate fingerprint or a pattern lock other than the main one.
The same thing happens with Guest Mode, where if the phone is transferred to someone in Guest mode, all the notes created there will disappear as soon as you leave this mode, which is an Android security feature that prevents the temporary user from leaking.
How to quickly switch between spaces?
File system: where the notes are physically located
For advanced users with superuser rights (Root), direct access to database files is available. Notes in MIUI are stored not as separate text files, but as entries in the SQLite database. The path to this file is strictly regulated by the Android security system.
To find a file, you need to use a file manager that supports system partitions, such as MT Manager or Root Explorer.
/data/data/com.miui.notes/databases/notes.dbThis file stores all the information, including text, date of creation and concealment flags. However, simply copying this file is not enough, because it requires special knowledge of the database structure. Regular users cannot access the /data/data folder without root permission.
| Type of data | Location. | Access without Root |
|---|---|---|
| Text of notes | notes.db (SQLite) | No. |
| Investments (photo) | /sdcard/MIUI/notes/ | Yes (partially) |
| Folder settings | SharedPreferences | No. |
| Basket | notes.db (trash table) | No. |
Attachments, such as images added to notes, can be duplicated into the device's public memory. Check the MIUI/notes folder in the internal storage. There may be image files there, even if the note itself is hidden or removed from the application interface.
Recovery through cloud synchronization
If local search didn’t work, you should look to cloud services. Xiaomi Cloud has its own note section that syncs regardless of the main interface of the phone. Sometimes the device has a cache crash and notes are not displayed, but they are stored intact on the server.
To check, you need to go to the official website of the cloud service through your browser. After logging in to your Mi Account, go to the Notes section, where you will see the full story, including those that may have disappeared from the smartphone screen, this is especially true if you have changed devices or performed a reset.
💡
Always enable note synchronization with Mi Cloud, which is the only reliable way to recover data after a device is lost or broken.
It's also worth checking out Google Keep if you've ever used the import or export feature.Some users mistakenly save important texts to third-party apps, thinking they're in Xiaomi's standard notebook.
What to do if the synchronization is suspended?
Third-party applications and alternative methods
If a standard application is damaged or deleted, you can use third-party tools to restore data or view databases. However, be careful: installing unverified programs can lead to personal information leakage.
There are aggregators that can read databases of different voice recorders and notebooks, and they can show the contents of a note.db file if you give them permission, and it's a complicated path that requires technical literacy, but it's often the only way to save important data.
- 📱 Use file managers with access to system folders (Root required).
- 💻 Connect your phone to your PC in debugging mode USB filesystem analysis.
- ☁️ Check the web version of Mi Cloud on your computer to find deleted copies.
Remember that alternative launchers or themes can visually hide icons or change the layout of menu items. If you’ve recently changed the theme, try returning the standard design to make sure the menu button isn’t hidden by the design.
☑️ Checking before contacting the service
Frequent problems and their solution
Users often find that after a system update, the interface changes and the usual buttons disappear.