How to use the flash drive on Android Xiaomi as a memory extension

Modern Xiaomi smartphones, despite the impressive specs, often face a lack of internal storage, especially models with a basic configuration of 64 or 128 GB. 4K And the accumulation of messenger cache quickly turns free space into a scarce resource, forcing users to look for ways to expand memory. MIUI (HyperOS provides an excellent opportunity to connect externally USB-storage and use it as a complete complement to the internal storage.

Using USB OTG (On-The-Go) to turn a flash drive into a powerful tool for working with files without requiring root rights or complex system reprogramming. Unlike the old methods, when you needed to mount the drive as internal memory with the risk of data loss, modern methods offer a safer and more flexible approach through file managers, you can instantly free up space by transferring archives, photos and videos to an external medium, while maintaining the speed of the system.

In this guide, we will discuss in detail the process of connecting, configuring and optimizing work with external drives on Redmi and POCO devices. We will consider compatible file system formats, features of working with different types of flash drives and answer questions that often arise from owners of Xiaomi smartphones when they first encounter OTG technology.

Checking OTG support and equipment selection

The first step before buying accessories is to make sure your smartphone is technically capable of running in host mode.Virtually all modern Xiaomi models released in the last 5-6 years have built-in support for the USB On-The-Go standard.However, in some cases, the feature may be disabled software or require activation in settings, which often causes connected devices to fail.

Not only will you need a USB flash drive to connect, but you will also need a special adapter or OTG cable. It is important to understand that connectors can be different: if your phone is equipped with a USB Type-C port, then the adapter must meet this standard. Older models with micro-USB will require appropriate adapters, which are now less common, but still relevant for the budget segment.

Note the size of the plug-in drive. While Android theoretically supports huge volumes, the file system and power of the phone's power controller may have limitations. Most often, drives up to 128 or 256 GB are easy to run, but larger drives may require external power to work.

⚠️ Note: When connecting powerful external hard drives (HDD) The battery power may not be enough through the phone port. USB-hub with additional power, otherwise there is a risk of damaging the charge controller of the smartphone.

File system preparation and formatting

Android is based on the Linux kernel, so it works out of the box perfectly with certain file systems.The most versatile format for flash drives to be used on Xiaomi phones and Windows computers is FAT32 or exFAT. The NTFS file system, popular in the Windows world, is also supported, but often requires the use of third-party drivers or file managers to record data.

If your flash drive is formatted in a format that your phone doesn't read, the system will prompt it to be formatted immediately after you connect. Remember, formatting will completely destroy all the data on the drive, so copy important information to your computer in advance. The formatting process can be done directly on your smartphone through the built-in file manager or settings menu.

For advanced users who want to use the flash drive as an extension of internal memory (Adoptable Storage technology), it may be necessary to format in proprietary Android format. However, on the MIUI shell, this feature is often hidden or removed by the manufacturer to ensure stability of operation.

Instructions for connection and initial setting

The process of connecting an external drive is simplified as much as possible in modern versions. MIUI And HyperOS. After you inserted it. OTG-the adapter and plugged in the flash drive, at the top of the screen (in the notification curtain) should appear the corresponding message.

If no notification appears, check the settings. USB. Some models need to manually select the mode of operation. USB. To do this, go to the developer menu (if it is enabled) or to the standard connection settings. Usually, the system itself offers to choose the action when connecting. USB-Devices: “File transfer”, “Charging” or «USB-accumulator».

It is important to always use the Safe Retrieval feature before physically disabling the drive.Abrupt pulling of the drive while writing data can cause file table damage and loss of information. MIUI It is enough to click on the notification of the connected USB-Select the option to Disable or Secure Removal.

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Always use the Safe Retrieval feature in the notification curtain before turning off the flash drive to avoid damaging data.

Working with a file manager and data transfer

The File Manager tool in Xiaomi smartphones has a wide enough functionality to manage external memory, which allows you not only to view files, but also to perform mass copying, moving and deleting operations. The interface is divided into categories, making it easier to navigate between internal memory and connected memory. USB-accumulator.

To move photos and videos that take up the most space, the most convenient way to use categories in the Explorer menu is to select hundreds of files at once, select the move or copy action, and specify the target folder on the external USB drive, which frees up precious internal space, leaving the system fast and responsive.

• 📂 Use the Cleanup function in Explorer to find duplicate files before transferring.
• 📁 Create a clear folder structure on the flash drive (for example, Photo 2026, Document Archive) for quick search.
• ⚙️ Set up the camera to save the photo immediately on SD-map USB, If this option is available in your model.

When working with large amounts of data, the copy speed can vary depending on the class of the flash drive and the version of the USB port of your phone. USB 3.0 and 3.1 drives provide significantly higher data transfer speeds compared to older USB 2.0 models. With USB 3.0, the backup process takes several times less time.

⚠️ Note: Some video formats (e.g, MKV with certain codecs) may not be played directly from the flash drive by a standard player, in which case install a third-party player, for example, VLC for Android MX Player.

Automation and expansion of functionality

Using a flash drive opens up possibilities not only for storage, but also for automating processes. Specialized applications allow you to set up automatic backup of certain folders when you connect an external drive, this is especially true for photographers or videoblogers who need to quickly reset footage.

There are applications that allow you to run certain programs or scripts immediately after you connect. USB-For example, when you connect a flash drive, the phone can automatically open a file manager or run a media player. MIUI or third-party applications like Tasker.

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To watch movies from a flash drive on your TV via your phone (reverse OTG mode) requires support for video output via USB-C (DisplayPort Alt Mode), which is not available in all Xiaomi models.

Also worth mentioning is the ability to use a flash drive to install some applications if the system allows cache transfer. While it is difficult to fully install the program on an external medium in new versions of Android, transferring heavy game files (OBB files and cache) to a flash drive often helps to free up critical megabytes.

Frequent problems and ways to solve them

Despite the simplicity of the technology, users can face a number of typical problems: often the phone simply “can’t see” the flash drive, although the power indicator on the adapter may burn, this may be due to the file system format that the phone does not support without additional drivers, or a lack of power.

Another common problem is slow read and write speeds, and if you notice that file copying is extremely slow, check if you're using a cheap adapter without high-speed protocols, and if the phone controller overheats during a long recording operation, the speed can drop.

• 🔌 Problem: The flash drive is not detected. Solution: Check the format (should be) FAT32/exFAT) and cable integrity OTG.
• 🐌 Problem: Slow speed. Solution: Use ports. USB 3.0 (usually blue inside) and quality cables.
• 🔋 Problem: Fast phone discharge. Solution: External drives consume power, turn them off when not in use.

In rare cases, you may need to reset your USB settings, which you can do through the developer menu by finding the default USB configuration and selecting Charging, then reconnecting the drive. If nothing helps, try checking the flash drive on your computer to rule out a malfunction.