Owners of smartphones Xiaomi, Redmi and POCO Often, they face a lack of built-in storage, especially when shooting high-resolution video or installing heavy games. The standard and fastest solution in this situation is to use an external drive. USB-drive, you need to properly configure the system and understand the principles of the interface OTG.
Modern devices of the Chinese brand support the technology of connecting peripherals "on the fly", which allows you to exchange data without rebooting. It is important to consider that the file system of the flash drive must be compatible with Android, and the drive itself must have sufficient power for stable operation. In this material, we will analyze all the nuances of turning a regular flash drive into a full-fledged memory extension of your gadget.
The process of integrating external storage does not require root rights or complex reprogramming of controllers, but just perform a series of sequential actions in the settings menu and properly prepare the storage medium itself. Let's take a detailed look at each step to avoid data loss and ensure maximum file transfer speed.
Compatibility check and equipment preparation
The first step is to believe that your smartphone is technically capable of interacting with external devices via a charging port. Virtually all Xiaomi models released after 2016 are equipped with a controller that supports the USB On-The-Go standard. However, having physical interface support does not always guarantee automatic operation without setting up.
You'll need it yourself. USB-a special device and a special adapter called OTG-If your flash drive has a plug. USB Type-C, the adapter may not be needed, but classic models require a signal conversion.
⚠️ Attention: Use of substandard OTG-cables can lead to voltage surges, which in rare cases disables the power controller of the smartphone motherboard.
It’s also worth checking the size of the plug-in. While modern Snapdragon and MediaTek processors work easily with terabyte drives, the file system may not support volumes above 2TB without formatting beforehand. For phones, flash drives ranging from 16 to 128GB are the best choice, as they consume less power.
Selecting a file system for Android compatibility
The key to turning a flash drive into a phone’s memory is choosing the right file system format. The Android operating system that runs the MIUI or HyperOS shell natively supports multiple formats, but not all of them are equally effective for different tasks.
The most common standard is FAT32, which is readable by all devices, including old car radios and media players, but it has a critical limitation: you can’t burn a file larger than 4GB to a FAT32 disk. If you plan to store movies in high quality, this option won’t work.
A more modern solution is the exFAT file system. It is free of file size restrictions and optimized for flash memory. Xiaomi smartphones work perfectly with this format, providing high read and write speeds. Formatting in exFAT is recommended for drives of 64 GB and above.
- 📁 FAT32 — Maximum compatibility, but no file support > 4GB.
- 💾 exFAT – ideal for large volumes and video files, runs on Android and Windows.
- 🔒 NTFS — native Windows format, Android requires special drivers or applications to record.
There is also the NTFS format, which is often used on hard drives. Android can only read data from such drives by default, but not write to them. To fully work with NTFS, you will need third-party file managers with support for plugins, which can slow down the system.
Why can't the phone see the NTFS file system?
Connecting a flash drive through OTG-adapter
Once the drive is ready, you can go to the physical connection. OTG-Adapter, then connect the adapter to the smartphone charging connector. Unlike older phones, modern Xiaomi models do not require the inclusion of special switches in the engineering menu to activate the port.
At the time of connection, you should hear a characteristic sound signal of the system, and in the notification curtain a message will appear about connecting a new one. USB-If notification doesn't work, try unlocking the screen or reconnecting the cable. Sometimes it takes a few seconds for the system to initialize the drivers.
To manage the connected storage, the system uses a built-in Download or Explorer component, and when it first connects, the system can request permission to access the files, and you have to agree to the request to be able to not only view, but also copy the data.
☑️ Connection check
In some cases, especially when using active cooled flash drives or LED displays, power consumption can be high. If the phone reports "too high power consumption," try using a shorter cable or flash drive without additional backlighting.
Access through the file manager
To make a flash drive a full-fledged part of your digital ecosystem, you need to learn how to manage files properly. MIUI automatically identifies the external drive and displays it at the root of the list of storages on a par with the internal memory and SD-card.
For convenience of work, it is recommended to immediately create a folder on the flash drive with an understandable name, for example, «Xiaomi_Backup» or «External_Media». This will avoid confusion when transferring data between devices. Just press and hold your finger in a free place, select "Create a folder" and specify a name.
If you plan to use a flash drive to expand your memory for photos and videos, you can set up automatic saving. Go to the camera settings, find the item "Save to the camera". SD-card (or external drive) and activate it. Now all new pictures will automatically fly to the flash drive.
| Action. | Internal memory. | External flash drive (OTG) |
|---|---|---|
| Reading speed | High (UFS) | Depends on the flash drive class. |
| Recording speed | Very high. | Medium/Low |
| Energy consumption | Minimum | Elevated (discharges phone) |
| Reliability | Tall. | Average (risk of loss when disconnected) |
The main purpose of the external disk is storage of multimedia and documents.
Safely extract the storage device
One of the most common causes of data loss and file system damage is a device that is not properly disabled. Android, like any other operating system, uses write caching, which means that the data may not yet be physically on the disk at the time when the progress bar has already shown 100%.
To safely extract, you must click on the Safe Retrieval icon in the notification curtain or in the Explorer app. Only after the message "Can be removed" appears. USB-The device will physically shut down and ignore this rule may cause errors on the next connection.
⚠️ Warning: Never pull out a flash drive while actively writing files or running applications using an external drive, this is guaranteed to damage the partition table.
If you forgot to perform a software extraction and just pulled out a flash drive, the next time you connect, the system may suggest checking the disk for errors.
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If you use a flash drive frequently, install the Safe Extract widget on your desktop for quick access to the shutdown function without opening the settings menu.
Solving Connection Problems and Errors
Despite the standardization of technology, users may encounter situations where the phone does not see the flash drive, and one common reason is that the drive is formatted in a file system that the phone does not support without additional drivers, such as HFS+ (Apple format).
Another reason could be power shortage. If you plug in a volumetric hard drive or a flash drive with a powerful LED display, the current is in the port. USB It may not be enough. It helps to use active USB-hub.
Also worth checking is the power saving settings. In rare cases, aggressive battery settings in MIUI can block power to the USB port when the screen is locked. Try adding a file manager to power saving mode exceptions.
- 🔌 Problem: Phone is not responding to the connection.Solution: Check integrity OTG-cable.
- 📂 Problem: Files are read, but not copied.Solution: Reformat the flash drive to exFAT.
- 🔋 Problem: The phone is running out quickly. Solution: Use a flash drive without backlighting or an active hub.
If nothing works, try connecting the drive to your computer and complete formatting with all partitions removed. Sometimes data from previous use on other devices interferes with the correct operation.
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90% of connection problems are solved by properly formatting the flash drive to exFAT or FAT32 format using a computer before connecting to the phone.