Cleaning the USB- drive in Xiaomi devices: the complete guide

Flash drives in Xiaomi devices — whether it’s a Redmi Note 12 smartphone, a Mi TV Q2 TV, or a router AX3000 — often become a repository of temporary files, app cache, and debris after updates. Over time, this leads to slowdowns, read errors, and even the inability to write new data. Cleaning up the USB- drive in the Xiaomi ecosystem has its nuances: From choosing the right file system (FAT32 for Mi TV or exFAT for >4GB files) to considering the features of the firmware MIUI or Google TV.

In this article, we will discuss all the current cleaning methods, from standard formatting through the device menu to low-level methods using ADB or third-party utilities. Particular attention will be paid to typical errors, for example, when a Xiaomi TV does not see a formatted flash drive or a smartphone gives a message “USB- drive is damaged.”

1 Preparing the USB- drive for cleaning: what to do before formatting

Before you start cleaning, follow the necessary preparatory steps to prevent the loss of important data and avoid compatibility issues.

• 📁 Back up. Move all critical files to another medium or to the Mi Cloud. Note that once formatted, data recovery will not be possible without specialized software.
• 🔍 Check the file system. Xiaomi Android TV-based devices (like the Mi Box S) often require FAT32, whereas smartphones support exFAT and NTFS (with limitations).
• 🛠️ Use the original cable. Cheap USB- extensions or damaged wires can cause formatting errors, especially on Xiaomi TVs with USB 2.0 ports.
• 🔋 Charge the device. If the cleaning is done on a smartphone, the charge level must be at least 30%.

Pay special attention to the size of the cluster when formatting. For flash drives up to 32 GB, it is optimal to choose 4096 bytes (4 KB), for drives more than 64 GB - 8192 bytes or 16 KB. The wrong choice can reduce the recording speed by 15-20%, which is critical for Xiaomi Mi TV when playing video in 4K.

⚠️ Warning: If the flash drive has been used in Linux systems or cameras before, it may have a file system ext4 or HFS+. Xiaomi devices do not support these formats - be sure to reformat the drive to FAT32/exFAT on a PC before cleaning.

2. Method 1: Formatting via Xiaomi TV menu (Mi TV, Redmi Smart TV)

Xiaomi TVs on the platform Google TV or PatchWall allow you to format USB- drives without connecting to a PC. This method is suitable for flash drives up to 128 GB, but has a limitation: only the FAT32 file system is supported.

Instructions:

1. Connect the flash drive to the USB port on your TV (it is recommended to use the rear port for stability).
2. Open Settings → Devices and accessories → USB- drive.
3. Select your drive and click "Format".
4. Confirm the action, wait until the completion (usually takes 1-3 minutes).

If the Format option is inactive, check:

• 🔌 Whether the drive is connected to the port USB 3.0 (blue connector) – some Xiaomi TV models block formatting via USB 2.0.
• 📛 Does the flash drive appear in the Sources menu (if not, try another drive).
• 🔄 Is the TV firmware updated (older PatchWall versions below 1.8.22 may not have formatting functionality).

⚠️ Warning: After formatting with Mi TV, some flash drives are no longer defined on a Windows PC 11. This is because the TV creates a hidden partition MIUI_Cache. To fix, complete formatting on the computer with all partitions removed.

3 Method 2: Cleaning through a Xiaomi smartphone (MIUI 12-14)

Xiaomi, Redmi and POCO smartphones based on MIUI can format USB- drives through the built-in file manager or settings. This method is convenient for flash drives up to 64 GB, but has a limitation: not all models support NTFS (for example, Redmi 9A only works with FAT32).

Step-by-step:

1. Connect the flash drive via the OTG- adapter (for Type-C or Micro-USB).
2. Open the Files app (or File Manager in global firmware).
3. Go to the section "USB-drive" → click "⋮" (menu) → "Storage settings."
4. Select "Format" and confirm the action.

If there is no option:

• 📱 Make sure you have global firmware (in the Chinese version MIUI, the formatting function may be disabled).
• 🔧 Enable Developer Mode and activate Debugging on USB in Settings → About Phone → Version MIUI (Tap 7 times).
• 🔄 Reboot your smartphone with the flash drive connected – sometimes the system won’t recognize the drive when you connect hot.

On smartphones with MIUI 14, a quick formatting option has appeared that takes less than 30 seconds, but does not remove damaged sectors.

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If the smartphone does not see the flash drive, try connecting it through an externally powered hub - some OTG- adapters do not provide sufficient current for drives larger than 64 GB.

Method 3: Full formatting on PC (to restore operability)

If the USB- drive is not detected by Xiaomi devices or if it produces an error, a low-level formatting on the computer will be required, which removes all partitions and restores the factory settings of the flash drive controller.

We use the built-in Windows utility - DiskPart:

diskpart


list disk




select disk X (where X is your flash drive number)




clean




create partition primary




formats fs=fat32 quick (or fs=exfat for >32GB)




assign




exit

For MacOS or Linux, GParted is suitable:

• 🖥️ Remove all existing partitions on the drive.
• 📊 Create a new partition with the FAT32 file system or exFAT.
• 🔄 Apply the changes and safely remove the drive.

If standard methods do not help, use specialized utilities:

⚠️ Warning: After using Rufus, some flash drives are no longer defined on the Xiaomi Mi Box S due to incompatibility with MBR- partitions. In this case, repeat formatting via DiskPart with the convert mbr option.

5. Method 4: Cleaning through ADB (for power users)

If the USB- drive is used to firmware Xiaomi devices (for example, to update the Mi TV via OTA), it can be cleaned using ADB. This method is useful when the flash drive is "locked" by the system after an unsuccessful update.

Instructions:

1. Connect your TV or smartphone to your PC and activate ADB (Settings → Developers → USB Debugging).
2. Enter the command to mount the drive: adb shell sm list-volumes Find the ID of your flash drive (for example, disk:179,65).
3. Format the section: adb shell mkfs.fat -F32 /dev/block/sda1 (replace sda1 with the current section).

For Mi TV with Google TV, use the alternative command:

adb shell recovery --wipe_data --storage=/mnt/usb

This method deletes all data without recovery, including hidden system files that can block reuse of the flash drive.

6. Method 5: Reset the drive through the engineering menu (for Mi TV)

If the flash drive was used to update the firmware Xiaomi TV and is no longer formatted by standard methods, try resetting through the engineering menu. This method works on models with an Amlogic processor (for example, Mi TV 4A, Redmi Smart TV X).

Algorithm of action:

1. Connect the flash drive to the TV.
2. On the remote, press sequentially: Menu → Settings → Device → About this device.
3. Click 5 times on the Android TV version to open the engineering menu.
4. Go to Storage → USB Storage → Format.

The engineering menu can also include:

• 🔄 Reset the USB cache (Clear USB Cache option) if the flash drive is detected but is slow.
• 📡 Disable Signature Verify (for written firmware, Disable Signature Verify option).
• 🔧 Restore the USB- port's factory settings (optional USB Port Reset).

⚠️ Warning: Do not change the USB Host Controller settings in the engineering menu, this may cause the USB ports on the TV to fail. Recovery will require flashing through UART.

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The engineering menu is the only way to clean the flash drive if it was “locked” after a failed firmware update Xiaomi TV.

7.Typical errors and their solutions

When cleaning USB- drives in Xiaomi devices, users often face typical problems.

If after all the manipulations, the flash drive still does not work:

• 🔧 Check it on another device (such as Samsung Smart TV or PlayStation) – if the error repeats, the drive is physically damaged.
• 🛒 For Xiaomi TVs, whitelisted flash drives are recommended: SanDisk Ultra, Kingston DataTraveler, Samsung Fit Plus. Cheap no-name drives often cause errors due to unstable controllers.
• 🔄 Update your device firmware — ExFAT support is improved in MIUI 14 and Google TV 12.

FAQ: Frequent questions about USB cleaning in Xiaomi