Modern smartphones and tablets Xiaomi are equipped with huge volumes of internal memory, but situations when free space becomes critically small, arise regularly. Often users are faced with the need to transfer gigabytes of photos, video archives or heavy documents, and cloud storage is slow or require a paid subscription. USB-storage.
Many device owners mistakenly believe that the USB flash drive can only be connected through a special adapter that you need to buy separately. In fact, USB On-The-Go (OTG) technology is already built into the vast majority of current models, from budget Redmi to flagship Mi and Black Shark. The right connection allows you not only to copy files, but also to run applications, watch movies in high quality and even backup the system.
In this article, we will discuss in detail all the nuances of working with external memory on the shell of MIUI and HyperOS. You will learn what file system formats are supported out of the box, how to properly extract the drive without losing data and what to do if the smartphone “does not see” the inserted flash drive.
Compatibility check and equipment preparation
Before looking for an adapter, you need to make sure that your specific Xiaomi smartphone supports the USB host function. Virtually all models released after 2016 have this feature at the hardware level, but software it can be hidden or require activation. If you have a very old budget, it is worth checking the specification of the processor on the manufacturer's website, since some entry-level chipsets do not know how to give power to external ports.
To connect, you'll need the drive itself and the appropriate adapter. Standard flash drives have a Type-A connector, whereas modern smartphones have a Type-C port (OTG-It is important to choose high-quality accessories: cheap Chinese adapters often do not withstand the declared current and can lead to unstable operation of the memory controller.
Pay attention to power consumption. If you're planning to plug in an external hard drive, not just a flash drive (HDD), The power of the smartphone may not be enough to promote it, in such cases, the disk will either not be determined, or will be permanently shut down. HDD It is recommended to use active USB-powerhouse.
⚠️ Attention: Use of substandard OTG-cables can cause voltage surges and damage to the power controller of your Xiaomi smartphone.
Before you physically connect, check the state of the charging port. The presence of dust, pile or oxidation of the contacts can prevent the correct connection. Carefully clean the connector with a non-metallic object, such as a wooden toothpick or compressed air.
Physical connection and interface configuration
The connection process is as simple as possible and does not require complex manipulations. Insert the adapter into the smartphone charging connector, and then connect the flash drive. Android automatically recognizes the new device. If this is the first time, the system notification of the connection may appear on the screen. USB-storage.
Immediately after you connect, the notification curtain (top-down swipe) will display the appropriate icon, clicking on it, you will be taken to the file manager. If you do not automatically transition, you must manually open the File Manager application, which is standard for MIUI and HyperOS shells.
In some rare cases, especially on custom firmware or global versions with regional limitations, the function is OTG You need to activate it in the developer settings. → About the phone and 7 times click on the version MIUI. Then on the menu Additional. → For developers, find the item "Include" USB OTG» or «USB-configuration and select mode of operation with external drives.
☑️ Checking connection readiness
After successful connection in the notification curtain will display a message «USB-Now you can work with files. Remember, using a flash drive, especially writing large amounts of data, consumes battery power faster than usual, because the smartphone acts as a power source.
File Systems: FAT32, exFAT and NTFS
One of the most common problems that users face is the refusal of a smartphone to read a flash drive. Most often the reason lies in the file system. Android and Xiaomi “out of the box” understand the formats FAT32 and exFAT. These formats are universal and work on computers, TVs and radios.
The NTFS file system (Windows standard) is more complicated. Many smartphones can't read NTFS without third-party software, because it's a proprietary Microsoft development. If your flash drive is formatted to NTFS, your phone may suggest that it be formatted, which will delete all data. To avoid this, use special driver apps or convert the file system to a PC.
Below is a table of file system compatibility with Xiaomi devices:
| File system | Support for Xiaomi (Native) | Max. File size. | Compatibility with Windows |
|---|---|---|---|
| FAT32 | Complete. | 4GB | Yes. |
| exFAT | Complete. | Limited by disk size | Yes (Win 7 and above) |
| NTFS | Partial (driver needed) | Limited by disk size | Yes. |
| ext4 | Root is required. | Limited by disk size | No (Linux/Android only) |
If you need to work with files larger than 4GB (like 4K movies), FAT32 is not suitable, as it has a limit on the size of a single file. In this case, exFAT is the best choice. It is free of FAT32 restrictions and is supported by most modern TVs and media players, unlike NTFS.
How to convert a file system without losing data?
Use of built-in conductor and third-party applications
The regular Explorer tool in MIUI is functional enough for basic tasks. Once you plug in the flash drive, a new section will appear in the main menu of the application, usually designated as "USB" or the name of the drive brand (for example, Sandisk, Kingston), and standard operations are available here: copy, cut, rename and delete files.
For more advanced users who do not have enough regular functionality, it is recommended to install third-party file managers, FX File Explorer and Total Commander. These applications are archive-ready, built-in. FTP-Customer, cloud storage support and, importantly, often have their own drivers for the cloud. NTFS.
Third-party applications may require special permissions. Android for security reasons restricts applications from accessing the file system. When you first run, the manager will ask permission to access All Files or a specific drive. You must agree and redirect the application to the system settings to grant rights.
⚠️ Note: When you delete files from an external flash drive through third-party applications, they may not get into the basket, but are deleted irrevocably.
It's also easy to run media files through file managers. Xiaomi's built-in player does a good job with video, but VLC or MX Player will offer more flexible audio and subtitles settings. Just select the file on the flash drive and specify the player you want as the default program.
Formatting the drive by means of a smartphone
If the flash drive is new or has an unsupported format, the system will prompt it to be formatted, and formatting is necessary if the drive is not working correctly or has file system errors. Before starting the procedure, be sure to copy important data to the computer, as in the process all information will be destroyed.
To start formatting go to Settings → Storage. Find the connected one on the list. USB-Click on it to open the control menu. Select "Clear" USB-drive" or "Format. "The system will warn you of data loss - confirm the action.
The process takes anywhere from a few seconds to a couple of minutes, depending on the amount of memory, and when completed, the smartphone will automatically reconnect the flash drive and assign it a file system that is optimal for operation (usually exFAT or FAT32), and now the drive is ready to write files.
There is also the possibility of formatting through the "Advanced Memory" menu (if supported by the model), but for ordinary flash drives this is not required. This mode turns the flash drive into part of internal memory by installing applications on it. USB-flash drives often below the speed of the built-in memory eMMC/UFS, What can slow down the smartphone.
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Before formatting a flash drive via your smartphone, make sure the battery is at least 30-40% charged.Suddenly turning off the device while creating a file spreadsheet can damage the drive controller.
Safe extraction and solution of common problems
Properly extracting the USB drive is key to the longevity of your data. Unlike older computers, modern smartphones can safely turn off devices hot, but the risk of damage to the file spreader when actively writing persists. Before physically turning off, always use software termination.
To do this, lower the notification curtain and find the icon USB-Press the button "Disable" or "Safe Removal" and wait for the system message that the drive can be removed, only then physically disconnect the cable.
If your smartphone does not see the flash drive, check the following points:
- 🔌 Cable Integrity: Try another OTG-adapter, as cables often break inside the insulation.
- 🔋 Energy consumption: If connected HDD, Try to power it from an external source or use a cable with two. USB-plugs (Y-cable), if the port of the phone allows (rarely).
- ⚙️ Settings USB: In the developer menu, check the mode of work USB. Sometimes it helps to switch from “charging” to “file transfer (MTP)».
- 📂 File system errors: Check the flash drive on your computer via chkdsk for errors.
Overheating is a common problem. When you write large files for a long time, the flash drive and the port of the phone can get warmer. If you notice a lot of heat, stop working and let the device cool down. Overheating can lead to trottling (speed reduction) or a temporary port shutdown.