How to Open a BAK File with Xiaomi: A Complete Guide to Recovering MIUI Backups

.bak files on Xiaomi smartphones are backups of data created by MIUI or third-party applications. They can contain contacts, SMS, application settings, call logs, and even user data from some programs. However, standard file managers often do not recognize this format, leaving users in a bewilderment: how to extract information from such a backup?

Complicating the problem is that Xiaomi does not provide an official tool for directly viewing the content of.bak files on a PC. In most cases, these files are designed to be restored through Mi PC Suite or built-in MIUI functions, but what if you want to access individual data without completely rolling back the system? In this article, we will discuss all the current methods, from standard to advanced, including working with ADB and third-party utilities.

What is it? BAK-The file on Xiaomi and where it is stored

Backup files in the Xiaomi ecosystem are divided into two types:

• 📱 Local backups MIUI — Created through the Settings menu → The phone. → Backups, stored in a folder. /MIUI/backup/AllBackup internal memory or SD-They have a name of the species. miui_backup_20260515.bak.
• 💾 Application backups are generated by separate programs (such as Titanium Backup or Swift Backup) and are located in the folders of these applications, often in encrypted form.
• 🖥️ Mi backups PC Suite — created when you connect your phone to your computer through a proprietary utility. Stored on a PC in a folder C:\Users\Name of the User\Documents\Xiaomi\MiPhoneManager\Backup.

It is important to understand that not all.bak files are the same. For example, backups from Mi PC Suite are proprietary and contain not only user data, but also proprietary information to restore the firmware. whereas local MIUI backups are often archives with encrypted data that can only be retrieved through official tools.

If you find a.bak file in your phone’s memory, check its origin first:

1. Open any file manager (e.g. Files by Google or standard MIUI Explorer).
2. Go to /MIUI/backup/AllBackup – if the file is there, it’s a backup of the system.
3. Check the date of creation and size of the file. Local backups usually weigh between 50MB and 1-2GB, depending on the amount of data.

Method 1: Recovery via Mi PC Suite (official method)

Mi PC Suite (or Mi Phone Manager) is a proprietary utility from Xiaomi for managing a smartphone from a PC. It can create and restore backups, including.bak files.

• ✅ You have an original.bak file created through Mi. PC Suite.
• ✅ You are ready to recover all data from the backup (selective recovery is impossible).
• ✅ Your smartphone is stable and not locked.

Instructions for remediation:

1. Download and install the latest version of the Mi PC Suite from the official website.
2. Connect your smartphone to your PC through USB-cable (it is recommended to use the original Xiaomi cable).
3. Turn on File Transfer (MTP) mode on your phone and allow debugging over USB in Settings → About Phone → MIUI version (click 7 times on the line with the version, then go back to Settings → Additional → For Developers and activate Debugging over USB).
4. Start Mi PC Suite, wait for the device to connect.
5. Go to Backup and select Restore.
6. Specify the path to your.bak file and follow the instructions on the screen.

Download the latest version of Mi PC Suite|Connect your phone to the original cable|Set the regimen on MTP phone-on|Activate debugging by USB|Charge your phone at least 50 times%|Close all background applications on PC-->

Limitations of the method:

• 🚫 It is impossible to recover individual files (for example, only contacts or photos) – the entire backup is restored.
• 🚫 If the backup is built on another Xiaomi model, the recovery may not work properly.
• 🚫 The process takes a long time (from 10 minutes to an hour, depending on the amount of data).

Method 2: Retrieving data via ADB (for advanced users)

If you need to access individual files from the.bak backup, you can use the ADB tool (Android Debug Bridge), which requires command line skills, but allows you to extract data without fully restoring the system.

Warning: Incorrect ADB commands can lead to data loss or system failure, and use this method only if you understand the risks.

Steps to extract data:

1. Install ADB and Fastboot Tools on PC.
2. Connect your smartphone to your computer and activate Debugging over USB (as described in the previous method).
3. Open the command prompt (Win + R → enter cmd) and check the device’s connection:

adb devices

If the phone appears in the list, move on to the next step.

1. Copy the.bak file from your phone to your PC (replace /path/to/backup.bak with the real path):

adb pull /sdcard/MIUI/backup/AllBackup/miui_backup_20260515.bak C:\Backup\

Now you have a local copy of the backup, but MIUI's.bak file is an encrypted archive, and you'll need some additional software to unpack it.

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If ADB doesn’t see the device, try restarting your phone and PC, and updating drivers via Google USB Driver.

Method 3: Using third-party unpacking software BAK-file

If the official methods do not fit, you can use third-party utilities. Below are proven programs for working with Xiaomi backups:

The MIUI Backup Extractor:

1. Download and unpack the utility on PC.
2. Place your.bak file in the folder with the program.
3. Run extract.bat (for Windows) or use the command in the terminal:

java -jar miui_backup_extractor.jar miui_backup_20260515.bak output_folder

Where output_folder — folder where the data will be retrieved.

💡

Most of Xiaomi’s.bak files are encrypted. Without root rights or special keys, you can only extract a fraction of the data (e.g., contacts in.vcf or SMS in.xml).

Method 4: Manual recovery via TWRP (for users with unlocked bootloader)

If your Xiaomi smartphone has an unlocked bootloader and a custom TWRP recap is installed, you can restore the backup directly through it.

• 🔧 Restore the full backup system (boot, system, data).
• 🔧 Extract individual partitions (e.g., only data with user files).

Instructions:

1. Download your.bak file to SD-card or internal memory of the phone.
2. Boot to TWRP (turn off the phone, then press Volume Up + Power).
3. Go to the Restore section and select your backup.
4. Check the sections that need to be restored (for example, only Data for user files).
5. Swipe for confirmation and wait for the process to end.

⚠️ Attention: Recovery through TWRP This can cause you to lose up-to-date data if you overwrite the Data section.

If your.bak file was created through MIUI instead of TWRP, it cannot be restored directly to the custom recavator, in which case you can unpack the backup to your PC first (see Method 3), and then transfer the files manually.

Method 5: Online services for conversion BAK-files (with caution!)

There are several online services on the Internet that offer to unpack.bak files, but it is highly recommended to use them for the following reasons:

• 🔓 Data leakage risk – you upload a backup copy that may contain personal information (passwords, messages, contacts).
• 🦠 Malware – many “converters” unpack files on the server side and can introduce viruses.
• 🚫 Low efficiency – most services do not support proprietary Xiaomi formats.

If you do decide to take a risk, use a virtual machine or sandbox to isolate potential threats.

• 🌐 RebaseData – supports some Android backup formats.
• 🌐 Online File Converter – can recognize.bak if it is a standard archive.

⚠️ Note: Before downloading a.bak file to a third party service, delete sensitive data from it (for example, through the Hex-Editor editor or utility). MIUI Backup Extractor on-premises. Even if the service promises privacy, the risk remains.

Frequent mistakes and their solutions

When working with.bak files, users often face the following problems:

If none of the methods worked, check:

• 🔍 File integrity -- maybe backup is corrupted. Compare the size to the original file.
• 🔍 Version MIUI — Backups from new versions may not be restored to old ones (and vice versa).
• 🔍 Access rights – some firmware requires root to work with backups.

FAQ: Answers to Frequent Questions