How to enable OTG on Xiaomi Redmi 8: the complete guide

Modern smartphones have long since ceased to be just devices for calls and have become powerful multimedia centers capable of performing tasks previously available only to personal computers. Xiaomi Redmi 8, despite its budget status, is equipped with support for USB On-The-Go technology, which opens up wide opportunities for the owner to expand the functionality of the gadget. However, many users face difficulties when trying to connect external flash memory or peripherals, since the system does not always automatically recognize a new device.

Enabling OTG on Xiaomi Redmi 8 is a process that does not require obtaining superuser rights or flashing the device, but involves knowing certain nuances of the MIUI shell. Unlike some other brands where the function is activated with a single button in the settings, in the Xiaomi ecosystem, the approach can vary depending on the version of Android and the installed shell. Understanding the principles of USB Host will allow you to easily transfer photos, watch movies from an external drive or even print text by connecting a wired keyboard.

In this article, we will discuss all the stages of preparation and connection, as well as the typical errors that you can encounter during operation. You will learn why the phone may not see the flash drive, how to format the drive correctly and what file system formats Redmi 8 supports. Follow the instructions consistently to avoid data loss and ensure stable operation of your smartphone with external hardware.

What is USB OTG technology and why is it needed?

abbreviation OTG It stands for On-The-Go, which literally translates as “on the go,” and this technology allows mobile devices like your Xiaomi Redmi 8 to act as a host (master device) to connect another periphery through a standard one. USB-In the past, the phone could only charge or transmit data to a computer, but with the advent of the Internet. OTG It becomes a “computer” that can “feed” energy and read data from connected gadgets.

The functionality of this technology goes far beyond just reading flash cards, and smartphone owners are using it to connect wired mice, which is especially useful when working with documents or in games where accuracy of aiming is important. It is also possible to connect joysticks, MIDI-Keyboards for musicians and even Ethernet network cards if you don’t have Wi-Fi but have wired internet.

It's important to understand that the Redmi 8 has certain power consumption restrictions. USB The 2.0 installed in this model is not capable of producing enough current to operate powerful external hard drives without additional power. HDD directly can lead to a voltage drop in the system and a sudden reboot of the smartphone, so for such purposes it is recommended to use active USB-hubs with their own power supply.

Compatibility check and equipment preparation

Before you buy an adapter or try to connect devices, you need to make sure that your particular instance of Xiaomi Redmi 8 correctly supports the USB OTG standard. Although technically the Snapdragon 439 chipset installed in this model fully supports this feature, software failures or port damage can interfere with normal operation.

You will need a new adapter, often called OTG-It's a short cord, where there's a micro-USB connector on one side. USB Type-C, which is relevant for newer models, but for the Redmi 8 it is exactly micro-USB, and on the other hand – a full-fledged model. USB-The quality of this accessory plays a critical role: cheap Chinese cables without shielding can cause interference and unstable connection.

Also worth paying attention to the file system of your drive. Android, the underlying shell MIUI, "out of the box" reads the formats FAT32 and exFAT. However, with the NTFS file system, which is often used on flash drives larger than 32 GB, there can be problems. At best, the phone will offer formatting the disk, at worst – simply will not see it.

⚠️ Note: Before connecting unknown USB-Make sure the devices are safe, theoretically, through the port. USB It's possible to introduce malicious code, although in practice, it's rare. Don't plug in suspicious drives found on the street or from unverified sources.

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Use adapters with an additional indicator of operation (LED), if the light on the cable lights up when you connect to the phone, then the port is functional and voltage is supplied, which makes it easier to diagnose.

Should I include OTG in the settings of Xiaomi Redmi 8?

One of the most common questions users have is, “Where is the power button?” Unlike OPPO, Vivo or Realme smartphones, where there is a separate USB OTG switch in the settings menu that needs to be activated manually, Xiaomi and Redmi smartphones have a different situation. In most versions of MIUI firmware, this feature is enabled by default and does not require manual activation.

The system is designed to automatically query the USB port for a connected device. Once you insert the USB adapter, the power controller detects the change in resistance and switches the port to host mode. If the device is not in use for a certain time (usually 10-15 minutes), the system automatically turns off the voltage supply to save battery power.

However, there are rare exceptions: In some older MIUI builds or Chinese firmware (CN ROM) versions translated into other languages, the option may be hidden. You can check for hidden menus through the engineering menu or search in settings, but for global versions (Global ROM), which are officially sold in Europe and the CIS, manual activation is not required.

Step-by-step connection instruction USB-storage

The process of connecting external memory to the Xiaomi Redmi 8 is as simple as possible, but requires a certain sequence of actions to avoid file system errors.

First, plug in. OTG-Make sure it is plugged in to the full stop, but without undue effort, so as not to damage the contact group of the micro-USB port, which is not particularly durable in this model. After connecting, you can hear the characteristic sound of the system notification or see the icon. USB status-line.

Now carefully insert a flash card or other device into the port of the adapter. on the screen of the smartphone should appear a pop-up notification «USB-If the notification doesn't appear, try unlocking the screen and pulling the notification curtain down, which may be a system message about the new device.

To access files, open the standard File Manager app, in the list of available storage facilities, along with internal memory and storage. SD-A new section should appear, usually called a «USB» or «USB-If this section is not available, go to the troubleshooting section below.

File system configuration and formatting

If your Xiaomi Redmi 8 sees a physical connection (sound is being made) but can't read the data, it's likely the problem lies in the file system.As mentioned earlier, native NTFS support in Android is limited.The system may suggest formatting the drive, warning that all data will be deleted.

Formatting is the process of creating a new disk markup. For flash drives up to 32 GB, the best choice is the FAT32 file system. It provides maximum compatibility with all devices, from TVs to auto recorders. However, FAT32 has a limitation: it does not support recording files larger than 4 GB. If you plan to watch high-resolution movies, this format will not work.

For larger storage or for large files, it is better to use the exFAT format. It is free from the FAT32 file size restrictions and works well with modern versions of Android. The formatting procedure is carried out directly in the smartphone, but requires caution.

To format your flash drive on Redmi 8, click on the Connection Notice or go to Settings → The vault, find yours. USB-The disk in the list, click on it and select "Format" and the system will warn you of data loss - confirm the action if you do not need a copy of the files or have already made it.

⚠️ Note: The formatting process is irreversible. All photos, documents and videos on the flash drive will be destroyed. Make sure you save important data on your computer or in the cloud before starting the procedure.

Solution: The phone can't see the device

The situation where Xiaomi Redmi 8 ignores the connected flash drive is quite common.The first thing to do is check the adapter itself. Cheap cables often fail or simply don't meet the OTG specifications. Try connecting the same cable to another phone or using a different cable with your Redmi 8.

The second common cause is power shortage. If you plug in a carbon panel, a powerful power source. RGB-If you're lighting up or you're using an external hard drive, you might not have enough battery power, and then you might even run out of power instead of charging. USB-hub.

It's also worth checking the power consumption settings. MIUI Aggressive energy savings can block work USB-port for background applications. Go to Settings → Battery → Power applications and make sure that the system process "Media server" or "Conductor" is not limited to "No background activity».

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If the phone doesn’t see the flash drive, 90% of the time the problem is either in an incompatible file system (NTFS), or in a faulty/low-quality OTG-adapter.

Advanced features: keyboards, mice and gamepads

Connecting the input peripherals opens up new horizons for the Redmi 8. Connecting a normal computer mouse will show you a cursor on the screen. This can be extremely useful if the touch screen is damaged (partially broken) and does not respond to touch in certain areas. The mouse will allow you to dial an emergency number, make a backup copy or send a message.

The keyboard is also automatically determined. You can type texts in messengers, notes or a browser. For Russian-speaking users, it is important that the layout is usually switched by the standard combination of Shift + Space or Ctrl + Space, depending on the settings of the input language in the system.

Gamers will appreciate the ability to connect wired gamepads. Many console emulators (DraStic, PPSSPP) and cloud-based gaming services support external controllers. This turns a budget smartphone into a portable game console. Just plug in a gamepad, launch a game, and enjoy tactile control without the delays inherent in a Bluetooth connection.

⚠️ Attention: With prolonged use of energy-intensive devices (keyboard illumination, gamepad vibration), the smartphone battery can discharge faster than usual.

Secure removal and disabling of devices

Although modern file systems are quite stable, the "safe extraction" rule has not been abolished, and if you pull the flash drive when you write a file or index a media library, the data can get corrupted and the file system itself goes into read-only mode until the next error check.

To properly disable the drive on Xiaomi Redmi 8, open the “curtain” notifications. there should be a message about the connected USB-Press it or the "Disable"/"Safe Removal" button, and once the system says the drive is off, you can physically remove the cable.

Alternative path through settings: go to Settings → Warehouse, find the section. USB-Click on the "Extract" icon (a triangle with a line) to ensure that all cached data is written to the disk before the port is de-energized.