Switching to a new smartphone or having to back up data often puts the user in the position of saving the phone book. Owners of Xiaomi, Redmi and Poco devices may face different interfaces. MIUI It's called HyperOS, but the basic principles of working with the file system are the same. USB-cable is one of the most reliable ways, which does not require a stable Internet connection and cloud storage.
Unlike wireless transmission, wired connection ensures high speed and stability of the process, which is especially critical when working with large amounts of data. Physical contact between devices eliminates the risk of interruption of synchronization due to voltage surges in the Wi-Fi network. In addition, this method allows direct access to system databases if standard export means for some reason are not available.
There are several proven methods for doing this, each with its own characteristics: You can use the standard MTP file transfer mode that is built into Android by default, or you can resort to more advanced ADB debugging tools for deep copying system files. The choice of the specific method depends on your technical training and the ultimate purpose of the information transfer.
Preparation of the device and the workplace before starting work
Before you start manipulating data, you need to make sure that the equipment is in good condition and the settings are correct. USB-cable, since many complete cords are only for charging and do not support data transmission. USB 3.0 will significantly reduce the likelihood of connection errors.
It is also important to prepare your computer: make sure it has the right drivers installed, especially if you are using older versions of Windows. In most cases, modern OSes will automatically recognize Xiaomi's device, but to work with debugging, additional Google USB Driver components may be required. Without the right drivers, the computer will only see the phone as a charger.
⚠️ Warning: Before connecting your phone to an unfamiliar computer, be sure to unlock the device's screen. MIUI Blocks access to the file system if the phone is locked.
Be sure to check the connectors on the smartphone itself. The presence of dust or pile in the Type-C port can prevent tight contact of contacts, which will lead to unstable connection. Careful cleaning of the connector before starting the procedure is a simple but important preventive measure.
- 🔌 Use an original or certified high quality cable to avoid data loss.
- 💻 Install current drivers ADB Fastboot on your personal computer.
- 🔓 Unlock the smartphone screen immediately after connecting the cable to the PC.
- 🧹 Clean it up. USB-port of the smartphone from dust using compressed air or soft brush.
Basic method: Export via file manager and MTP mode
The easiest and most affordable way to do this without needing to install any additional software is to use the built-in export functionality, which is to upload contacts to the universal.vcf (vCard) format in the MIUI or HyperOS shell, which is supported by almost all email clients and phone books, and then easily transferred to your computer as a regular document.
To start, open the standard Contacts app on your Xiaomi device. From the settings menu or through the “More” button, find “Import and Export Contacts.” Select “Export to Device Memory” or “Export to a.vcf file.” The system will prompt you to save the file, which is usually located in the root of internal memory or in the MIUI folder by default.
Once you create a file, connect your smartphone to your computer via USB. You'll see a notification on your phone's connection mode -- select File Transfer or MTP. Now a new device will appear in My Computer. Find the saved contact file and copy it to your PC's hard drive.
💡
Save backups of contacts with date in file name, for example contacts_backup_2026.vcf, So as not to get confused in the versions.
The advantage of this method is its versatility and security: you don’t make changes to system partitions, you just create a copy of the data. vCard format allows you to easily import contacts back to your phone or Google account if necessary, making this a perfect way for regular backup.
Advanced Method: Retrieving a Database through ADB
For users who want to gain full access to the contact database, including hidden fields and metadata, the Android Debug Bridge (ADB) toolkit is a good way to copy the SQLite database system file, which stores all the phone book information, and requires the USB debugging mode to be included in the Developer Menu.
To activate Developer Mode, go to Settings → About Phone and quickly click on the MIUI version seven times. After the message “You became a developer” appears, go back to the main settings menu, find the “Additional” section and turn on “Debugging by USB.” When you connect to your PC, a debugging permission request will appear on your smartphone screen, which you need to confirm.
adb pull /data/data/com.android.providers.contacts/databases/contacts2.db C:/Backup/Executing this command will copy the database file contacts2.db from the phone's internal memory to the specified folder on the computer. /data/data/ root rights may be required if your smartphone does not have an unlocked bootloader.On some versions of Android, access this folder through ADB Rootless rights closed by security policies.
⚠️ Attention: Database file contacts2.db It contains sensitive personal information, and you keep it in a secure place and don't give it to third parties, because it's not encrypted separately from the system.
Using ADB gives you complete control over your data, allowing you to make accurate copies of it for later analysis or recovery in the event of a major firmware failure.This is a professional tool that should be used with caution, as incorrect actions can lead to malfunctioning of system applications.
☑️ Checking before working with ADB
Use of Mi PC Suite and Alternatives
Xiaomi has previously been actively promoting its own Mi PC Suite software for managing smartphone content from a computer, but official support for this program for global firmware versions has been discontinued, and modern smartphones may not be defined correctly.
If you're using an old model or a Chinese firmware version, the Mi PC Suite allows you to create full backups, including contacts, messages and call logs. The program creates an archive that is stored on your computer and allows you to restore data to a new device of the same brand at any time. The program interface is fully translated and intuitive.
As a modern alternative, third-party managers such as Android File Transfer or universal Android management utilities operate on the principle of an advanced file manager, providing convenient access to the folder structure, but to work with contacts, they still require pre-exporting data to a file inside the smartphone itself.
| Method | Difficulty | I need a Root. | Type of data |
|---|---|---|---|
| Exports to.vcf | Low. | No. | Text of contacts |
| ADB Pull | Tall. | Often. | SQLite database |
| Mi PC Suite | Medium | No. | Full backup |
| Cloud synchronization | Low. | No. | Online copy |
The choice of tool depends on your goals: for household use, a vCard file is enough, whereas for migration of the entire system or deep analysis, you will need ADB or specialized software. It is important to understand the limitations of each method so that you do not waste time on the wrong solution.
Solving Connection and Visibility Problems
Often users are faced with a situation where the computer does not see the connected smartphone Xiaomi. USB-By default, the phone can go into Charge Only mode, ignoring data requests. To fix this, lower the notification curtain after the cable is connected and select the mode. MTP (Media Transfer Protocol).
Another problem may be the lack of drivers in the Windows operating system. If an unknown device with an exclamation point appears in Device Manager, you need to manually update the driver. Download the universal Google USB Driver driver or use automatic installation through a system update. Sometimes it helps to simply restart the Android ADB Interface service.
⚠️ Note: If the computer makes a connection sound, but the device doesn’t appear in My Computer, the problem is almost certainly in mode. USB or a faulty cable, not a software failure of the phone.
It is also worth checking the energy saving settings. USB-Windows ports. The system can turn off ports to save power, which causes the connection to break during copying large files. USB-root hub in the device manager.
- 🔄 Try connecting the cable to another. USB-port, preferably at the back of the system unit.
- 📱 Reboot your smartphone with the cable connected to re-initiate the connection.
- 💻 Check the Device Manager for errors in the Controllers section USB».
- 🛡️ Temporarily disable the antivirus that can block access to the Android file system.