Modern Xiaomi smartphones have long turned into full-fledged handheld computers capable of performing tasks previously only available to desktop PCs. One of the key features that expand the capabilities of the device is the support of OTG (On-The-Go) technology, which allows you to connect external drives, keyboards, mice and even game controllers to the phone. Users often wonder where to find the switch of this feature in the menu, but in the shell of MIUI and the new HyperOS, the situation has its nuances that require detailed clarification.
Unlike some other manufacturers, Xiaomi engineers have implemented support. USB-host at the hardware level in almost all current models. This means that a separate button "Enable" OTG» In the standard settings menu, there is usually no settings, since the system automatically detects the connected device. However, the absence of an explicit switch doesn’t mean the process is always smooth – there are file system limitations and power requirements to be aware of.
In this article, we will discuss in detail how to check the support of the technology on your device, what file formats Xiaomi reads without additional programs, and what to do if the smartphone does not see the connected flash drive. We will also look at the hidden developer settings and ways to force the host mode for advanced users.
Verification of hardware support and compatibility
Before looking for software settings, make sure your device is physically capable of running in host mode. Virtually all Xiaomi smartphones released after 2016 have built-in USB OTG support. However, in budget models of past years or specific modifications for some regions, this feature may have been software-limited or absent at the power controller level.
For quick checks, you can use specialized applications from Google Play, such as USB OTG Checker. They analyze the system files build.prop and tell you whether the Android kernel sees the ability to work with external devices. If the application shows a negative result, the chances of successful connection are minimal, you are not ready for firmware or modification of the kernel.
⚠️ Note: Even if the app confirms support, it does not guarantee work with any drives. USB In a smartphone, you may not be able to cope with energy-intensive external hard drives without additional power.
Android version and port type are also worth considering. Devices with USB Type-C port usually have a more modern protocol implementation that allows data to be transmitted and powered simultaneously. Owners of models with a Micro-USB connector may need high-quality adapters, since cheap cables often do not have the necessary contact splashing to transfer data.
No switch in the settings menu
Many users, when they click through the menus of other brands, start frantically looking for an OTG item in the "Additional Features" or "Extended Settings" section. There is no such switch on Redmi and POCO smartphones with a MIUI shell. The system is designed to work on the principle of Plug-and-Play: you plug the device in, and it immediately appears in the file manager.
The lack of visible settings is often confusing, creating the illusion of a fault. USB-The host is active by default and is in sleep mode, waiting for the peripheral to connect. If the function were turned off programmatically, the system would simply ignore the physical connection without giving any signals.
In the rare cases where the feature is disabled at the firmware level (for example, in some Chinese versions for the domestic market without global certification), it is impossible to activate it through the standard menu. ADB-commands or third-party applications requiring root rights but for 99% of global versions MIUI It's not required.
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Use the original adapter or OTG cable from Xiaomi – they are guaranteed to have the correct contact soldering and a built-in resistor to identify the host mode.
Working with the file system and formatting
The most common reason why users can’t “find” their flash drive after connecting is file system incompatibility. Android, the underlying MIUI, natively and best works with FAT32 format. If your flash drive is formatted in NTFS (Windows standard) or exFAT, the smartphone can see it, but can’t read the content or offer formatting.
Formatting the storage device will lead to complete loss of data, so before connecting to the phone, it is recommended to copy important information to the computer. If the flash drive has a volume of more than 32 GB, the Android system by default will not allow it to be formatted in FAT32 by standard means, since this format has a limit on the size of one file (no more than 4 GB).
To work with large files and volumes, it is better to use a file manager with driver support, for example, Microsoft. exFAT/NTFS for USB by Paragon Software or MLUSB Mounter. These apps allow you to mount partitions. NTFS and exFAT, making them readable and writeable without losing data.
| File system | Android support | Max. File size. | Recommendation |
|---|---|---|---|
| FAT32 | Complete (native) | 4GB | Perfect for documents and photos |
| NTFS | Reading (recording through applications) | 16 TB | For films and large archives |
| exFAT | Partial (depending on the model) | 128 PB | Optimal for flash drives >64 GB |
| EXT4 | Complete (Linux/Android) | Depends on the OS. | Only for advanced users |
If you plan to use the flash drive solely to expand your phone’s memory (although Adoptable Storage is often hidden in newer versions of Android), choose the exFAT or NTFS format using third-party software for maximum compatibility.
Use of the built-in file manager
Once the drive is successfully connected, it is accessed through the standard File Manager app, and a new section will appear on the side menu or home screen, usually referred to as USB or the name of the flash drive manufacturer, and this is where file management takes place: copy, move and delete.
It is important to note that when you first connect, the system may request permission to access files. You must confirm this action, otherwise the conductor will not be able to display the content. In some versions of MIUI, a pop-up window can appear in the corner of the screen and disappear quickly, so be careful in the first seconds after you connect.
- 📂 For quick access to photos and videos, use the Images or Video tabs inside the conductor, filtering the source as USB.
- 📤 Copying large amounts of data is better done in small portions, so as not to overheat the smartphone controller.
- 🔌 Before removing the flash drive, be sure to press the "Disable" button. USB-drive" in the notification curtain or in the conductor.
⚠️ Warning: Never pull out a flash drive while writing data, which can damage the file table and lose all the information on the drive, and in rare cases, crash. USB-port.
Xiaomi’s standard conductor can back up contacts and messages directly to the connected device USB-drive. This function is in the "Tools" section» -> «Backup is a great way to save important data without using cloud services.
☑️ Connection check
Settings for developers and USB mode
If the standard connection does not work, you can try to change the mode of operation. USB-To enter this section, you need to click on the build number several times in the About Phone menu. Once you become a developer, a new menu will open in the Additional section».
Inside the developer menu, find the default USB configuration, and try switching from Charging to File Transfer (MTP) or PTP, which, while primarily focused on connecting to a computer, can help the system correctly define the external drive protocol in some cases.
Settings -> About Phone -> (7 times tap on "Version MIUI") ->
Additional -> For developers -> USB configurationAlso in this menu may be the item "Debugging by USB». It's not activated. OTG directly, but allows you to use a computer to diagnose connection problems ADB-commands, if standard methods are powerless.
Secret. ADB-team
Addressing Nutrition and Compatibility Issues
One of the main technical problems is the lack of power. USB-port limited voltage (usually up to 500 mA or 1 A in mode) OTG). If you are connecting an energy-intensive external hard drive (HDD), It may not have enough current to spin the discs, in which case the phone may simply not identify the device or constantly reboot.
There are active efforts to address this problem. USB-It's a self-powered hub that connects to the charger, and it connects to the phone and the hard drive, and it ensures that you can work consistently with even large amounts of data.
In addition, the problem can lie in the cable itself, the adapter is cheap Chinese adapters often have high resistance or incorrect soldering of the contact ID, which does not switch to the host mode. quality OTG cable with shielding and the right resistor on the contact ID - the key to a stable connection.
- 🔋 If the phone quickly discharges with a connected flash drive, this is normal - there is an energy consumption on the drive power.
- ❄️ With long-term work with OTG The smartphone can get hot because the controller USB load-bearing.
- 🚫 Do not connect powerful devices (external) DVD-drives, fans) directly without an active hub.
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If the flash drive is not detected, try connecting it through it first. USB-externally powered hub - this will eliminate the problem of lack of current.