Introduction: Why Xiaomi Mi 9T OTG-advancer and flash drive?
Smartphone Xiaomi Mi 9T (also known as the Redmi K20 In some regions, there's 64 or 128 GB of internal memory, but no microSD card slot, which is easy to get around if you plug an external flash drive in. OTG-adapter - a small device that converts the connector USB-C smartphone USB-A This method allows you to transfer files without a computer, watch movies from an external drive or even run applications (with support). USB OTG).
However, not all adapters are equally compatible with the Mi. 9T, And the connection process itself can be accompanied by errors, from power outages to file system problems. In this article, we will discuss step-by-step instructions, the nuances of adapter selection, Android settings and solving typical problems. MIUI Different versions that can block access to storage devices.
What adapter is needed for Xiaomi Mi 9T?
Smartphone Xiaomi Mi 9T plug USB Type-C, so you will need to connect the flash drive OTG-adapter USB-C on USB-A. But not all adapters are equally effective:
- 🔌 Type of connector: required USB-C (male) → USB-A (Avoid micro-USB adapters, they won't work.
- ⚡ Power support: Some flash drives require additional power (especially capacity) >64 GB) Optimal choice of passive power adapters (without external source).
- 📦 Cable length: short adapters (5-10 cm) are more reliable, but for convenience you can take an elongated version (up to 20 cm).
- 🛡️ Certification: Check for labeling USB-IF — This ensures compatibility with the protocol. USB OTG.
Among the tested models for the Mi 9T stand out:
- 🔹 Xiaomi USB-C to USB Adapter (original, but often faked).
- 🔹 Baseus USB-C OTG (budget, with metal body).
- 🔹 UGREEN USB-C to USB 3.0 (supports high-speed transmission).
⚠️ Cheap uncertified adapters can not only fail, but also damage the port USB-C Check the reviews of a particular model on sites like AliExpress or Amazon before buying.
2. Step-by-step instruction: how to connect a flash drive
The process of connecting an external drive to the Xiaomi Mi 9T consists of several steps.
- Preparation of the flash drive: 📁 Format the drive in FAT32 exFAT (NTFS It is not supported by most smartphones). 🔋 Make sure the flash drive does not require additional power (if the capacity is >128GB may be needed to powered USB-hub).
- Connecting the adapter: 🔌 Put it in carefully. OTG-port-walker USB-C smartphone. 💾 Connect the flash drive to the adapter. Wait for the beep or the notification.
Set up Android
- 📱 A notification will appear on the screen "USB-The drive is connected.
- 🔄 From the menu, select "Use as a media device" (or "Transfer files" in new versions). MIUI).
⚠️ Warning: if you use a flash drive with an indicator and it does not light up when connecting to Mi 9T, The problem is probably malnutrition. Try plugging the adapter in via externally powered USB-hub.
3. MIUI settings for working with external drives
Even after successfully connecting the flash drive, the Xiaomi Mi 9T may restrict access to files due to MIUI security settings.
- 🔓 Permissions for File Manager: Go to Settings → Annexes → Application management → Files and enable permissions to access "Memory" and "USB-accumulator".
- 📂 Display hidden files: In the file manager (Mi File Manager) open the menu (three dots) and activate "Show hidden files" if you need to work with system data.
- 🔄 Data transfer mode: In the connection notification USB select "File Transfer" (MTP), Not "Charging" or "Photo Camera".
| Problem. | Possible cause | Decision |
|---|---|---|
| The flash drive is undetectable. | Lack of nutrition | Use an OTG with external power or hub |
| Error "Device not supported" | NTFS file system | Reformatting to FAT32/exFAT |
| Files are not copied. | MIUI's restrictions on recording | Give root rights or use a third-party file manager |
| Adapter's warming up | Low-quality OTG | Replace the adapter with a certified adapter |
💡
If you often work with external drives, install an alternative file manager, such as Solid Explorer or a file manager. FX File Explorer. They're better at processing. OTG-Devices and support cloud services.
4.Why Xiaomi Mi 9T doesn't see the flash drive: typical bugs
Even with the right connection, the Xiaomi Mi 9T may not recognize an external drive.
- 🔋 Insufficient power: flash drives with capacity >64 GB or c LED-The indicator often requires more energy than the port can provide. USB-C So the solution is to use an externally powered OTG-hub.
- 🖥️ Incompatible file system: Android does not support NTFS If the flash drive is formatted in NTFS, Connect it to your PC and reformat it to exFAT (supports files) >4 GB) or FAT32.
- 📱 Lockdown MIUI: In some versions of the firmware, access to OTG Check the developer's settings: go to Settings → The phone. → Version. MIUI (Tap 7 times, then in Settings → Additionally. → For developers and include "Debugging by" USB" and “Configuration” USB default" → "MTP".
- 🔌 Adapter problems: Cheap OTG-The adapters may not support the protocol. USB Mass Storage.Check the adapter on another device or replace it.
⚠️ Note: if after connecting the flash drive Mi 9T It starts to discharge quickly, which is a sign of a short circuit in the adapter. OTG-adapter!
What if the flash drive is detected, but the files are not opened?
5. Alternative ways to connect the flash drive to the Mi 9T
If OTG-adapter is not working or you need to connect the drive without an adapter, consider alternative methods:
- 🌐 Cloud storage: Upload files from a flash drive to Google Drive, Mi Cloud or Yandex Disk, then download them to your smartphone. Suitable for rare data sharing.
- 📡 Local area network (FTP/HTTP): With apps like this. FX File Explorer or Solid Explorer can be arranged FTP-server on a PC and connect to it from a smartphone via Wi-Fi.
- 🔄 Wireless flash drive: Wi-Fi-enabled drives (like SanDisk Connect) connect to a smartphone as a standalone device without a single device. OTG.
💡
OTG-switch is the fastest and most versatile way, but for constant work with large amounts of data it is more convenient to use cloud services or FTP.
If you need to constantly expand your memory 9T, Consider the option of portable SSD (for example, Samsung T5) high-quality OTG-It's an adapter. It supports the drive. USB 3.1 and provide transmission speeds of up to 500 MB/s.
6 Security: How to avoid data damage
Working with external drives through OTG carries the risk of data loss or USB drive damage.
- ⚡ Secure extraction: Before disabling the flash drive, click "Extract" in the Android notification or in the file manager.
- 🔒 Data encryption: If sensitive files are stored on the flash drive, encrypt it with VeraCrypt (on a PC) or ES File Explorer (on Android).
- 🛡️ Virus protection: Check it with an antivirus (like Dr.Web or Kaspersky) before connecting a flash drive to a smartphone. Mobile viruses rarely affect Android through a smartphone. OTG, But there's a risk.
- 📉 Temperature control: If the adapter or flash drive is heated above 50°C, disable them.Overheating can cause data loss or port damage USB-C.
⚠️ Warning: Never connect to Mi 9T through OTG hard-drive (HDD) They require more power than a smartphone can provide, and this can incapacitate the controller. USB-C.