Xiaomi smartphone owners often face a lack of built-in storage, especially if the device has a basic memory configuration. USB-flash-drive OTG, But before you use it, you have to prepare it properly, and the formatting process is not just about deleting data, it's about creating a new file system that Android can correctly recognize and use to record information.
An incorrectly formatted drive may not appear in the file manager or run extremely slowly, causing freezes when transferring large files. Owners of Redmi and Poco devices should be especially careful in choosing parameters, since the stability of multimedia functions depends on this. In this article, we will analyze all the nuances of the process so that you can avoid common errors.
Selection of file system for the storage
The first and most important step is to determine the type of file system your file system will be formatted into. USB-The standard and most versatile option for Android is FAT32, It's a system that allows for maximum compatibility with a variety of devices, including car radios, televisions and old computers, but it has a significant limitation: It does not support recording individual files larger than 4GB, which can be a problem for high-resolution movies.
If you plan to store heavy files on a flash drive, it’s worth considering more modern formats like exFAT or NTFS. The exFAT system is devoid of file size restrictions and works great with Android, but may not be readable on some older devices without installing additional drivers. NTFS is native to Windows, but on Xiaomi smartphones it often requires special apps or root rights to work with it, since a standard file manager can only offer read without the ability to write.
When choosing, you should be guided by where exactly you will use the drive most often. For transferring documents and photos between different gadgets, a universal device is better suited. FAT32. If the flash drive will serve only as a memory extension for your tablet or phone to view 4K-The exFAT format will be the best choice for high speed and support large amounts of data.
- 📁 FAT32 — Maximum compatibility, but files up to 4GB.
- ⚡ ExFAT – Support for large files and high speed.
- 💻 NTFS — Suitable for Windows, requires Android testing.
- 🔒 ext4 — native-format Linux/Android, Cannot be read on Windows without drivers.
⚠️ Note: When you change the file system, all data on the media will be permanently deleted. Be sure to back up important information on your computer before starting the procedure.
Preparation of smartphones and accessories
Before you start technical manipulations, you need to make sure that the equipment used is healthy. To connect the flash drive to the Xiaomi smartphone, you will need a high-quality OTG (On-The-Go) adapter. Cheap adapters may not provide enough power, which will cause the drive to be permanently disconnected or not detected by the system at all.
It is also important to check the battery charge of your device. The process of formatting and subsequent writing of data consumes a significant amount of energy. If the charge falls below the critical level during the operation, it can damage the file table and the USB drive fails. It is recommended that the charge level is at least 50-60% before work begins.
Make sure that your smartphone has the current version of the firmware installed. MIUI Older versions of the shells may have had bugs that interfered with the proper operation of external drives of large volume. USB-Controller, which improves the stability of the connection.
☑️ Pre-formatting verification
Formatting through Android settings
The easiest and safest way to prepare a flash drive is to use the built-in operating system tools. OTG-adapter, the smartphone screen should appear the corresponding notification. If the automatic window does not appear, you need to go to the Settings menu of your device.
In the settings, find the memory partition. Depending on the version of the MIUI shell, it can be called About Phone, Advanced Settings, or Storage. In the list of available drives, you will see your connected flash drive. Click on it to open the control menu.
Then select Format or Clear, and the system will alert you that all data will be deleted, confirm the action, and the process will take from a few seconds to a couple of minutes, depending on the storage capacity. Once the operation is complete, Android will automatically create the file system you need, usually choosing FAT32 or exFAT by default.
| Action. | The way is on the menu | The result |
|---|---|---|
| Connection | Physical through OTG | Emergence of notice |
| Searching for a section | Settings → About the phone → Storage | Display USB-storage |
| Starting the process | Selecting USB → Formatting | Creating a file system |
| Completion | Automatic. | Readiness for work |
What to do if the formatting button is inactive?
Use of the Mi Cleaner app
Xiaomi smartphones pre-installed the system application Mi Cleaner (Security), which has advanced functionality for working with memory. This tool is often more effective than the standard settings menu, as it allows you not only to format, but also to check the drive for errors.
To access the feature, open the Safety app (green zipper icon). At the bottom of the screen or in the Cleanup section, find the item associated with the USB-The application interface is optimized for quick action, so the formatting process here takes place in one click.
The advantage of using Mi Cleaner is that the utility itself will offer the optimal file system format depending on the capacity of your USB drive.In addition, after formatting, the application can immediately scan the drive for viruses, which is a good security practice when using external media.
- 🛡️ Built-in protection against malware.
- ⚙️ Automatic selection of formatting parameters.
- 🚀 Quick access without deep immersion in settings.
- 📊 Possibility of analyzing the occupied place immediately after cleaning.
⚠️ Note: Do not remove the flash drive while the Mi Cleaner app is running. Interrupting the scanning or cleaning process can lead to logical errors in the partition structure.
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To speed up work with large files on the USB drive, turn off the battery settings energy saving mode during data transfer. This will prevent the voltage reduction on the USB port.
Formatting via computer for Xiaomi
If the smartphone for some reason refuses to format the drive or chooses the wrong file system, you can use a personal computer, which gives you complete control over the process and allows you to choose a specific cluster size, which can be useful for advanced users.
Connect the flash drive to your computer, right-click on the drive icon in My Computer and select Format. In the File System field, select exFAT for Android compatibility and support for large files. Cluster size leave by default or select Standard Size.
Once you have completed your PC operation, reconnect the flash drive to your Xiaomi smartphone via OTG. Android may request an access confirmation or suggest that you format the drive again. If the file system is already compatible (exFAT or FAT32), the phone simply recognizes files without losing data.
Way to Windows: My Computer → PCM on Disk → Format → exFAT → StartIt is worth noting that when formatting on a computer, it is important not to create partitions in a format. NTFS, If you don't plan on using special drivers on your phone, Android will see most of the time. NTFS-Disk only in read mode, which limits functionality.
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Formatting on PC gives more control, but requires compliance with the file system's compatibility with Android to avoid reading problems.
Using a flash drive as an internal memory
One of the most useful features of Android is the ability to use it. USB-It's a storage device as an extension of internal memory, and it allows you to install applications directly onto the flash drive, freeing up valuable space in the main storage of the smartphone.
To activate this function after connecting and formatting the flash drive, go to Settings → Advanced settings → Memory, choose yours. USB-the drive and click "Use as internal storage" and the system will warn that the drive will be formatted and encrypted, and then will become unavailable to other devices.
This method is ideal for devices with a small amount of internal memory, such as 32 or 64 GB. However, it should be borne in mind that the speed of applications can be lower than when running from the native flash storage of the phone, especially if you use a cheap flash drive with a low read / write speed.
- 📲 Possibility of installing heavy games and applications.
- 🔒 Data is encrypted and linked to a specific smartphone.
- ⚠️ Requires a flash drive with high recording speed (class 10 and above).
- 🔄 You can't just take out the flash drive without unmounting.
⚠️ Note: When using the flash drive as internal memory, it cannot be used on other devices without re-formatting.All data will be encrypted with the key of your specific Xiaomi smartphone.