Xiaomi and Redmi smartphone users often face the need to find a physical note file, whether for backup or data recovery after a crash. The standard open folder and look approach doesn’t work here, because Android, especially the MIUI or HyperOS shell, hides application data from direct access without root rights.
But technically, this data exists and takes up space in the internal memory of the device. Understanding the structure of the file system allows you to access a database where all your records are stored, including text, creation time, and even deleted items that have not yet been overwritten by the system. In this article, we will discuss in detail system folders, extraction methods and synchronization methods.
It’s worth noting that simply copying a file and opening it on another device may not work because of SQLite’s database encryption, but knowing the exact location of files is the first and most important step to managing your data at the file system level.
System Storage Architecture in MIUI and HyperOS
The Android operating system uses isolated storage for each installed application" (MIUI Notes) has a dedicated partition in memory that is restricted by access rights. /data/data/com.miui.notes/databases, But you can get there only by having superuser rights (root) or using debugging. ADB permittingly.
If your device doesn’t have root rights, the system won’t even allow you to see the contents of the /data/ folder through a standard Explorer, in which case the operating system redirects requests to an emulated space where files can only be accessed by the application itself, meaning that the physical database file is securely protected from accidental deletion or modification by third-party programs.
⚠️ Attention! Attempts to obtain root rights or modify system partitions can lead to loss of warranty and disruption of banking applications (Google Pay, Mi Pay.
The newer versions of HyperOS firmware have remained the same, but encryption mechanisms have become stricter. The database can be encrypted with a key tied to a particular instance of the application or Mi Account, so even when you find a file, you may need additional tools to decrypt it.
The exact path to the note database files
The main file that stores the notes usually has the.db or.sqlite extension. In the standard MIUI configuration, the path to this file is as follows:
/data/data/com.miui.notes/databases/notes.dbSometimes, depending on the version of the shell, the file or folder name may vary slightly, such as containing a version prefix or journal suffix for temporary transaction data![WIDGET:spoiler: Why can the file be called differently?] Depending on the version of MIUI (12, 13, 14) or HyperOS, developers can change the internal structure of the packages. Sometimes the file is called note.db or lies in the subfolder with the version number.
In addition to the main database file, the same directory may contain journal files that are created by the system to ensure the integrity of data when writing. If the recording process has been interrupted (for example, the battery has died), the system uses these files to restore the database structure, and manually deleting them is not recommended if the application is not working correctly.
To access these files, you’ll need a root-enabled file manager, such as Root Explorer or Solid Explorer, with a plugin attached. Without these tools, the /data/ folder will be empty or unavailable for viewing.
Access via computer and ADB (no Root)
If you don’t want to get root rights, but you need to copy note files, you can use the Android Debug Bridge tool (ADB). This method allows you to execute commands on behalf of the system, bypassing some limitations, although access to the system is not limited. /data/data/ It can still be closed without root rights on modern versions of Android (above). 10-11).
However, trying to back up the app through ADB is a great idea. Connect your smartphone to your computer, enable USB debugging in the Developer Menu, and follow the backup command:
adb backup -f notes_backup.ab -noapk com.miui.notesFile received notes_backup.ab You can try to unpack it on your computer with special utilities (like Android Backup Extractor) to extract the database, which is more complicated, but safer, to guarantee the device.
⚠️ Attention! On Android 12 and later (including HyperOS), the adb backup command may not work for system applications for security reasons.
Alternative paths and local copies
In addition to the system database, Notes can create local copies or export files if the user has explicitly initiated the saving. Sometimes users forget that they exported the note in.txt or.html format. Check the following directories in the internal storage (available without root):
- 📁 /MIUI/notes/ — Temporary files or attachments may be stored here.
- 📁 /Android/data/com.miui.notes/files/ — cache and application data folder available in some file managers.
- 📁 /Download/ — Often users accidentally save their exports here.
- 📁 /MIUI/Gallery/cloud/cache/ — If sync with gallery is enabled, some text blocks can be cached here.
It’s also worth checking /data/local/tmp/ through ADB if you’ve done any data transfers there before, and sometimes scripts leave temporary copies of databases there.
It is important to understand the difference between a database file (which contains the structure and all the records) and a text file (which is just a copy of text).
☑️ Check before searching for files
Recovering deleted notes from the database
If your goal is to recover deleted information, then working with the notes.db file requires special knowledge. The SQLite database stores deleted records in what is called the "free space" of the file until the new data overwrites these memory cells, which means that the deleted note can technically still be in the file.
To extract such data, the database file must be copied to the computer and opened using the HEX-editor or specialized software for SQLite recovery (e.g., SQLite Database Browser or SQLite Database Browser) DB Browser for SQLite. In text form, you can find the remnants of lines that were in the note inside the file.
| Access method | Necessary rights | Difficulty | Efficiency |
|---|---|---|---|
| Conductor (Root) | Root | Low. | Tall. |
| ADB Backup | No (ADB) | Medium | Medium |
| Mi Cloud (Web) | Mi Account | Low. | High (if there was synchronization) |
| Hex-analysis of the file | Root + PC | Tall. | Depends on the re-recording. |
If you plan to work with the database directly, make sure to copy it to your computer before any manipulations. Damage to the notes.db file can cause the application to stop running or lose all current records.
Synchronization through Mi Cloud as an alternative
The most reliable and easy way to access note files without digging into system folders is to use the Mi Cloud cloud service. If you have synced, your data is stored on Xiaomi servers and accessible via the web interface, which eliminates the need to search for files inside the phone.
To check for copies, go to i.mi.com and log in to your Mi Account. In Notes, you'll see all synchronized records. From there, you can export them in text format, which is the only legal way to get data if the phone is broken or not turned on.
💡
Turn on automatic note sync with Mi Cloud right now. It takes a minute, but it saves your data in case your phone is lost.
However, if synchronization is not enabled, this method is powerless. In such cases, you can only rely on local files in the device memory, as mentioned above. Regularly exporting important notes to PDF or TXT format to /Download/ is also good practice.