How to install a memory card in a Xiaomi phone: instructions with photos and nuances

Xiaomi smartphones are some of the most popular devices with support for memory expansion via microSD cards. However, even a simple process like installing a drive is fraught with nuances, from choosing the right format (FAT32 or exFAT) to configuring the card as internal storage in MIUI. In this article, we will analyze all the steps from buying a suitable card to optimizing its operation, and also revealing the hidden restrictions of Xiaomi on using microSD in models with a hybrid slot.

Many users experience problems after installation: the phone does not see the map, data disappears after restarting or the write speed is poor, the reasons are due to incorrect formatting, incompatibility of standards or errors in the system settings, we will discuss in detail how to avoid these errors and maximize the use of additional storage.

1. Which memory cards support Xiaomi smartphones

Not all Xiaomi models work the same with microSD. Key options to look for when choosing:

• 🔹 Type of slot: hybrid (compatible with nano-SIM) + microSD or 2 nano-SIM) or dedicated (microSD only). e.g. Redmi Note 12 Pro+ It has a hybrid slot, and POCO X5 Pro - dedicated.
• 🔹 Maximum volume: Most current models support up to 1TB, but low-end devices (e.g. Redmi) A2) Can be limited to 512 GB.
• 🔹 Speed class: for recording video in 4K class UHS-I U3 or V30. Class cards C10 Suitable only for photos and music.
• 🔹 File system: MIUI working correctly FAT32 (up to 32 GB), exFAT (up to 1 TB) and NTFS (read-only).

Importantly, some Xiaomi models (like the Black Shark 5 Pro) don’t support microSD formatting as internal memory — only as portable storage.

2. Step-by-step instructions: how to insert a memory card in Xiaomi

Before installing, make sure the phone is turned off - this will prevent damage to the slot contacts.If your model supports hot replacement (such as the POCO M6 Pro), you can insert the card without turning off, but we recommend reinsurance.

Algorithm of action:

1. 📱 Turn off the phone with a long press on the power button and select the item Turn off.
2. 🔧 Remove the tray for SIM-You can use a paper clip or a special key (includes) to insert the paper clip into the hole on the sidebar and press it carefully.
3. 📁 Place the microSD in the appropriate slot: In the hybrid tray, the memory card takes the second place SIM-In a dedicated slot, the microSD is installed separately from the SIM.

Put the tray back in.

Turn on the phone.

⚠️ Warning: If the card is not visible after installation, check: Is the microSD inserted correctly (contacts must be downwards), is there any physical damage to the card or slot, and does your model support this volume (e.g. Redmi). 9A doesn't work with maps >256GB).

3. Memory card formatting: FAT32, exFAT or NTFS?

After the first connection, MIUI will suggest formatting the card, and it is important to choose the right file system:

• 📁 FAT32: Compatible with all devices, but limited to files up to 4 GB. Suitable for music, photos and small videos.
• 📁 ExFAT: the best choice for Xiaomi – supports files >4 GB and volumes up to 1 TB Recommended for video in 4K play.
• 📁 NTFS: MIUI It only supports reading. Don't choose this option!

How to format the card directly on the phone:

1. Go to Settings → Storage → Memory Map.
2. Click Format → Internal Memory (if you need to expand your main storage) or Portable Storage (for separate use).
3. Select the file system (exFAT is preferred).
4. Confirm the action – all data on the map will be deleted!

One important thing is that if you format a card as internal memory, MIUI will encrypt it. Once it's extracted, it will not be available on other devices! To transfer files back to your PC, you'll need to mount the card in the settings.

4. Set up a memory card as an internal storage

Using microSD as internal memory allows you to install applications directly onto it, but there are limitations.

• ⚠️ Not all applications can be portable (e.g. system or high performance requirements).
• ⚠️ The speed of applications from the card will be lower than with internal memory (especially on budget models Redmi).
• ⚠️ After extracting the map, the application will stop working on it.

How to set up:

1. Open the Settings → Storage → Memory Map.
2. Select Settings (⚙️) → Internal memory.
3. Confirm the formatting (the data will be deleted!).
4. After the reboot, go to Settings → Applications → Application Management.
5. Select the application and click Transfer to SD-Card (not available for all programs).

💡

To speed up memory card applications, use a class A2 microSD (such as SanDisk Extreme A2), which is optimized for randomly writing small files, which is critical for Android.

⚠️ Note: On Xiaomi models with MIUI 14+ Porting apps to the map may be blocked for some games (e.g. Genshin Impact or the likes of the game). PUBG This is due to Google's data security policy.

5. Problem Solving: Phone Can't See Memory Card

If the microSD is not detected after installation, check the following points:

If the card has previously worked, but Suddenly has stopped being defined, try:

1. Reboot the phone.
2. Clear the cache in Settings → Apps → Storage → Clear the cache.
3. Update the firmware (Settings → About the phone → System update).
4. Check the card on another device (for example, on a PC through a card reader).

💡

If the memory card stopped working after the MIUI update, try rolling back to the previous firmware version or resetting to factory settings (with data saved). Often microSD recognition bugs are fixed in the following patches.

6. Optimization of memory card in Xiaomi

To extend the life of microSD and avoid data loss:

• 🔄 Backups regularly: even reliable cards (like SanDisk Extreme) can fail. Use the Mi Cloud cloud or copy files to your PC.
• 🚫 Do not remove the card while recording: this causes damage to the file system. Always use the function Safe extraction in the notification curtain.
• 📉 Control the space: when less than 10% of memory is left on the card, the write speed drops by 2-3 times. → Warehouse → Cleanup.
• 🔋 Avoid cheap cards without a brand: they are often forged and have a real volume many times less than stated. H2testw PC-only.

To speed up the work of the map in MIUI:

1. Turn off automatic optimization for the card: Settings → Warehouse → Memory map → Settings (⚙️) → Turn off optimization.
2. Use file managers that support caching (such as Mi File Manager or Solid Explorer).
3. For games and heavy apps, allocate at least 10 GB of free space on the map.

7. Comparison of microSD and internal memory: which is better for Xiaomi

Many users are doubtful whether to buy a smartphone with a large amount of internal memory or enough microSD.

Bottom Line: If you want maximum performance (for example, for games or 8K video), you’d better choose a model with a large internal memory (256 GB of UFS 3.1). If flexibility and low price are the priority, microSD is a good solution for storing media files and lightweight applications.

Frequently asked questions