Xiaomi smartphones based on MIUI They offer flexible options for external storage, but not all users know how to make the most of a microSD card. The main problem is that the default system saves files to internal memory, quickly filling it. SD-The card allows not only to free up space, but also to speed up the operation of the device due to the distribution of the load.
In this article, we will analyze all ways to transfer data to an external drive: from basic settings to the basic settings. MIUI You will learn how to force a memory card to become the main storage for photos, videos, applications and system updates, as well as avoid typical formatting errors. POCO Android-based 10-14.
Preparation of a memory card: selection and formatting
Xiaomi supports microSD up to 2 TB (depending on the model), but for stable operation, it is recommended to use A1/A2 or UHS-I U3 drives. Cheap cards without marking often cause errors when writing files.
Important point: MIUI offers two options for map formatting:
- 📁 Portable storage: The card works like a removable disk, and you can transfer files to it manually.
- 🔄 Internal memory – the card becomes part of the system (Adoptable Storage format), allowing you to install applications on it. Note: after that, the card can not be retrieved without losing data!
To format the card as an internal memory:
- Insert the card into the slot (or adapter for hybrid models).
- Go to Settings → Memory → SD card.
- Select Set Up → Internal memory.
- Confirm the action – the system will automatically transfer some data and optimize the map for Android.
⚠️ Note: After formatting as internal memory, the card will not be read on other devices (for example, on a PC via a card reader.
2.Setting up file saving by default
Once the map is ready, you can specify it as the primary storage for new files, and MIUI does this separately for each type of data.
| Type of file | Path in settings | Notes |
|---|---|---|
| Photos and videos | Settings → Applications → Camera → Storage | Select the Card. SD. Some models (POCO F5, Redmi Note 12 allows you to save 4K-Videos only in internal memory. |
| Downloads from the browser | Settings → Applications → Browser → Storage | Chrome's way: ⋮ → Downloads. → Download folder. |
| Screenshots | Settings → Additional → Screenshots | On some firmware, the option is hidden – use the file manager for manual transfer. |
| System updates | Settings → The phone. → Update MIUI → ⋮ → Settings | FAT32 (not exFAT!) card is required. |
For Google Play apps (e.g. YouTube, WhatsApp), the save path changes in their own settings: ⋮ → Settings → Memory and data → Preservation of media.
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If the option to select a memory card is not in the camera settings, update the Camera app via Play Market or clear its cache in Settings → Apps.
3. Transfer of installed applications to SD-map
Even if the card is formatted as internal memory, not all applications can be transferred to it. MIUI blocks the movement of system utilities and some games (for example, Genshin Impact or PUBG Mobile due to cheat protection).
- Open Settings → Applications → Application Management.
- Select the app you want (like Facebook or Spotify).
- Click Memory → Change → SD card.
- Confirm the transfer. The process may take a few minutes.
If the button is inactive, change:
- 🔹 The application is system-based (e.g. Mi Home or Themes).
- 🔹 Developer blocked the transfer in manifest (often found in banking applications).
- 🔹 Map formatted as portable storage – application transfer is impossible.
Map formatted as internal memory |
Free ≥10% of the map space |
Application not system and not from the white list MIUI|
Battery charge ≥50% (transfer consumes a lot of energy)-->
⚠️ Attention: Transferred to SD-The application card may run slower, especially if the class card A1 For games and heavy programs (like Lightroom), it is better to leave internal memory behind.
4. Automatic upload of files to the card via MIUI
MIUI It has a hidden function of automatic transfer of files to SD-It's a map that's not enough space to activate it:
- Go to Settings → Memory → Cleanup.
- Press the badge. ⚙️ top-right.
- Turn on the automatic cleaning option.
- Select Port files to the SD card if there is a shortage of space.
The system will automatically move:
- 📸 Photos and videos older than 30 days (unless marked as "Favorites").
- 📄 Documents (PDF, DOCX) from the download folder.
- 🎵 Audio files (MP3, M4A), If they are not used by offline players.
Limitations of function:
- 🚫 Do not transfer files from application folders (for example, Telegram cache or VK).
- 🚫 Minimum free memory threshold for operation: 500 MB.
- 🚫 It does not work if the card is connected as a portable storage.
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Automatic file transfer is the easiest way to free up internal memory, but it doesn’t replace manual save settings for the camera and downloads.
5. Solving memory card problems
If your smartphone doesn’t see the card or there are errors when recording, check the following points:
| Problem. | Possible cause | Decision |
|---|---|---|
| Map not determined | Bad contact, oxidation of the connector | Clean the slot with alcohol, try another card |
| "Map damaged" error | File system is damaged | Format your map in FAT32 via PC |
| Slow recording/reading | Class A1 or lower card | Replace the UHS-I U3 or A2 card |
| Applications not portable | The map is not formatted as an internal | Perform formatting through Settings → Memory |
If the card is determined, but the files are not saved:
- Check access rights: Settings → Applications → Rights Management → Memory.
- Update the firmware: some bugs with SD-The cards are corrected in new versions MIUI.
- Reset the Files application settings (Settings → Applications → Files → Reset).
What if your smartphone asks you to format your card every time you connect?
6. Optimization of work with a memory card
To extend the life of the card and avoid data loss:
- 🔋 Remove the card only through secure shutdown (Settings) → Memory. → Map. SD → Extract. Hot extraction can damage the file system.
- 📊 Check the health of the card regularly with apps like SD Card Tester or A1 SD Bench.Record speed below 10 MB/s - a sign of wear.
- 🗑️ Don’t fill 100% of the card – leave at least 10% free space for stable work.
- 🔄 Once 3-6 Format the map for months (with a pre-data backup) and this clears up fragmented files.
For models with a hybrid slot (Redmi Note 11, POCO X5), consider:
- 📱 When using a memory card, the second SIM-map off.
- 🔌 Some firmware limits card speed in a hybrid slot to UHS-I (even if the card supports UHS-II).
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If you shoot 4K video frequently, use a SanDisk Extreme or Samsung Pro Endurance card – these are optimized for high loads and have a recording life of up to 100,000 hours.
7. Alternative Memory Management Methods
If the transfer is SD-The card is impossible or ineffective, consider other options:
- ☁️ Cloud storage: Mi Cloud (5GB free), Google Drive or Yandex Disk with autoload photo. → ⋮ → Cloud settings.
- 🖥️ PC streaming: Use Mi Drop or LocalSend to transfer files over Wi-Fi without using smartphone memory.
- 🔧 Cache Cleanup: Regularly delete unnecessary data through Settings → Memory. → Cleanup. This is especially true for Telegram, TikTok and Instagram.
- 📦 Archiving: Compress rarely used files into ZIP through the Files or RAR for Android.
For advanced users:
adb shell sm set-force-adoptable trueThis command (executed via ADB) compulsorily allows any card to be used as internal memory, even if the system does not support it.
⚠️ Note: When using cloud services, turn off the autoload of original photos/video in high definition if you have limited traffic. → Backup.