Xiaomi smartphone owners often face the need to transfer data to a new device or secure information before flashing. The standard Mi Cloud service is convenient, but has free volume restrictions, so local redundancy remains the most reliable and free way to save contacts, SMS and system settings. Understanding the structure of the MIUI or HyperOS file system is critical when automatic recovery for some reason does not work.
Many users lose important data simply because they donβt know the exact location of the archives after formatting or changing the Explorer. The Android file shell on Xiaomi devices has its own directory organization features that have changed with the release of new versions of Android 11, 12, 13 and 14. In this article, we will discuss in detail where to look for backups, how to create them correctly and what to do if the standard paths are empty.
The Standard Path to Backup Files
By default, the built-in MIUI Backup utility stores all the archives you created in a strictly defined part of internal memory. Unless you changed the storage settings manually, the path to data will always start with the root directory of the device. To access these files, you will need any file manager, such as a standard Explorer or more advanced MT Manager.
The main directory in which the system folds data packets is called MIUI. Inside it is a backup folder, which in turn contains the AllBackup subdirectory. This is where the.bak files and the time tag folders contain contacts, call logs and messages. The full path is: /storage/emulated/0/MIUI/backup/AllBackup.
β οΈ Note: When connecting a smartphone to a computer through USB-cable in the "File Transfer" mode folder MIUI It may be hidden or unavailable due to Android security limitations. To access backup system files, it is better to use the file manager directly on the phone.
Inside the AllBackup folder, you'll see files with names that are made up of the date and time of the backup, which contain the packaged data of the applications and their settings, and you can separate the system settings files that weigh a little, but are critical to restoring the interface after a reset.
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Before you delete old backup files, be sure to check their contents through the Recovery function in the settings so as not to erase the actual data.
Features of storage on Android 11, 12, 13 and 14
With the release of operating system updates, Google has tightened its file system access policy, which directly affected Xiaomi owners. Starting with Android 11, access to root folders for third-party applications is limited, and standard paths can lead to virtual directories, which means that older file managers may simply βnot seeβ the MIUI folder when trying to scan.
In newer firmware versions, the path to data remains the same visually, but access rights change. If you use a third-party explorer, it can request special permission to access the Android folder or root directories. Xiaomi System Explorer usually has these rights by default, but when you switch to custom launchers or file managers (for example, Total Commander), display errors can occur.
How to access hidden folders on Android 13+?
In addition, new HyperOS devices can add prefixes that point to the user (e.g., 0 for the main user).It is important to understand that file system-level encryption can make backups unreadable on other devices without unlocking the original Mi Account.
Backup of the SD-map
One of the most useful functions of a local backup is the ability to store data not in internal memory, but on external memory. SD-This is especially true when you create full copies of a system that can take up to tens of gigabytes. To activate this feature, you need to go to the backup settings and change the target disk.
The adjustment process is as follows:
- π± Open Settings and go to About Phone section.
- πΎ Click on Reservation and Restore (or Advanced Settings).
- π½ Select Data Reservation and enter a protection password if it is set.
- π In the top menu or in the settings (three dots) select Settings and specify SD-card.
After the change of path, all new archives will be created at /storage/sdcard1/MIUI/backup/AllBackup (the path can vary depending on the model and version of Android), which allows you to free up internal space and protect data from loss in the event of a critical failure of the main memory of the device.
βοΈ Checking before backup SD
However, it is important to remember that the speed of the recording SD-The card is often lower than the internal drive, so the backup process can take longer, and the memory cards are more prone to physical damage and corruption of data, so do not rely on them as the only repository of important information.
Analysis of folder contents and file types
Once youβve figured out the paths, itβs important to understand whatβs stored in the archives youβve created. Xiaomiβs backup files have different structures depending on the type of data. System settings, contacts, and SMS are usually packaged into compact files, while application data (photos, cache, documents) take up the bulk of the data.
The table below shows the main data types and their approximate weight, depending on the activity of use:
| Type of data | Approximate size | Storage format | Importance |
|---|---|---|---|
| Contacts and SMS | 1-50 MB | Text/Binary | Critical |
| System settings (Wi-Fi, alarm clocks) | 100 KB - 5 MB | XML/Binary | Tall. |
| Application data (messenger) | 100MB - 5GB | Data archive | Medium/High |
| Photo and video (if included) | 1 GB - 100+ GB | Original | Critical |
Files with the.bak extension are encrypted containers. Trying to open them directly through a text editor will not lead to anything β you will see only a set of unreadable characters. Decryption and retrieval of data occur automatically only through the regular recovery menu of the phone.
β οΈ Warning: Do not attempt to rename backup files or change the folder structure inside the archive manually.This will break checksums and the system will refuse to restore data from the damaged backup.
For advanced users, it is possible to unpack some types of backups on a PC using special utilities, but this requires root rights and a deep understanding of the structure of Android. For most users, it is safer to rely on built-in MIUI tools.
Recovering data from a local copy
The process of data recovery is as important as its creation. If you have switched to a new phone or reset to factory settings, the first step after the initial setup should be to restore from a local copy. Make sure that the backup file is in the correct folder (MIUI/backup/AllBackup) on the device from which you plan to restore.
To initiate the procedure:
- π Go to Settings. β The phone. β Reservation and rehabilitation.
- π Select the Data Recovery (Mobile Device) option).
- π Enter the password that was used when creating the backup.
- β Select the desired backup date and tick the data for recovery.
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Recovery from local copy works faster than cloud and does not require a stable Internet connection, which is ideal for large amounts of data.
The system will warn you that current data can be overwritten. This is standard behavior: Wi-Fi settings, passwords and contacts will be replaced with those that were at the time of the backup creation. Apps will be downloaded from Google Play or Mi GetApps, but their internal data structure (save games, correspondence) will return to its original state.
If the recovery process is interrupted or gives an error, check the integrity of the backup file. Sometimes it helps to re-copy the archive file to the destination folder, as when you transfer the file wirelessly, the file may be corrupted.
Problems and solutions when working with backups
Despite the system's reliability, users can encounter errors, the most common being "backup file not found" or "recovery error," which often happens when you transfer files from your computer back to your phone if you have broken folder structure or access rights.
Another common situation is the incompatibility of Android versions: trying to restore the backup created on Android 13 to a device with Android 10 can lead to errors or partial restoration.
What if the backup doesnβt see the files?
To minimize risk, always create duplicate copies of important data on an external medium. Local backup is a great tool, but it should not be the only way to protect information. Regularly checking the relevance of backups (at least once a month) will help avoid unpleasant surprises at a critical time.