How to put a memory card in a Xiaomi phone: instructions for all models

Installing a memory card in a Xiaomi smartphone seems like a simple procedure, but in practice, users face nuances from choosing the right type of microSD to configuring it as an internal or external drive. In this article, we will analyze all the steps from buying a suitable card to optimizing its work in Redmi, Poco and Mi phones.

We will focus on hybrid slot models (where the memory card takes the place of the second SIM), as it is important not to lose connection during installation, and explain why some cards are not defined by the MIUI system and how to fix this without losing data.

If you’re planning to expand your memory for photos, apps, or games, but don’t know where to start, this guide will help you avoid common mistakes and make the most of the extra space.

1. Which memory card to choose for Xiaomi: technical requirements

Not all microSD cards work equally well on Xiaomi smartphones, and the manufacturer recommends using UHS-I (U1/U3) or A1/A2 speed drives to record data stably.

• 🔹 Volume: 32 GB to 1 TB (maximum supported volume depends on the phone model). For example, Redmi Note 12 works with cards up to 1 TB, and Poco works with cards up to 1 TB. X3 — up to 512GB.
• 🔹 Speed class: minimum Class 10 (10 MB/s), but for video recording 4K better U3 (30 MB/s) or A2 (4000 IOPS).
• 🔹 Brand: Preferably SanDisk, Samsung EVO, Kingston Canvas – They are less forged and last longer.
• 🔹 Format: MicroSDXC only for cards >32GB (all modern Xiaomi support this standard).

⚠️ Attention: Cheap cards without certification often have an understated real speed and can lead to data loss when used intensively. H2testw pre-purchase.

Critical error: microSDHC cards (up to 32 GB) are not supported in Xiaomi’s new MIUI 14+ models due to the limitations of the exFAT file system. If your phone can’t see the drive, check its format in your computer settings.

2.Where is the memory card slot in Xiaomi

The slot's location depends on the model, and in most cases it's combined with a tray for the slot. SIM-map and:

• 📍 On the right end (for example, Redmi Note 12, Poco) X5).
• 📍 On the top end (rarely as in the Mi). 10T).
• 📍 Under the sliding panel (in old models of the Mi type) A2).

To remove the tray, use a paper clip or a special key from the kit. Put it in a small hole next to the slot before you click. Don't use force, it can break the mechanism.

⚠️ Note: In hybrid slot models (e.g. Redmi) 9A) The memory card takes place second place SIM. If you need two SIMs and a microSD at the same time, you’ll have to choose a phone with a separate slot (like Poco). M5).

3. Step-by-step instruction: how to insert a memory card

Before installing, turn off your phone to avoid slot malfunctions. Follow the algorithm:

1. Remove the tray: Insert the paperclip into the hole next to the slot and pull gently.
2. Place the map: 🔹 If the slot is hybrid, select the priority: SIM MicroSD (cannot work at the same time). 🔹 The map is set by contacts down, beveled corner to the phone.

Put the tray back in:

Turn on the phone:

If the map is not determined:

• 🔄 Reboot the phone.
• 🧹 Clean the contacts of the card with a soft eraser (without alcohol!).
• 🔧 Try formatting it on PC in FAT32 exFAT.

4. Memory card setup: internal or external drive

After installation, the MIUI system will offer to select the mode of use of the card:

• 📱 Adoptable Storage: The card becomes part of the system and can be used to transfer applications. ⚠️ Disadvantage: after extraction, the data on the map will be unavailable on other devices. ⚠️ The map is encrypted and formatted in ext4 — The original format can only be returned through a complete reset.
• 🗃️ Portable Storage: The card is used to store files (photos, videos, music). ✅ You can retrieve and connect to other devices without losing data.

To select the regime:

1. When you first connect, click Setup in the notification.
2. Choose to use as internal memory or to use as external memory.
3. If you choose an internal one, wait for the formatting (it can take up to 10 minutes).

💡

If you plan to use the card for applications, take a model with a class A2 – it is optimized for random recording of small files (cache, game data).

⚠️ Note: When you select the internal memory mode, the card will be formatted and all data on it will be deleted.

5. How to transfer data and applications to a memory card

If the card is configured as an external drive, you can manually move files through Files → Categories. To automatically save photos / videos:

1. Open the camera → Settings → Save Place.
2. Select Memory Card.

To transfer applications (only if the card is used as internal memory):

1. Go to Settings → Applications → Application Management.
2. Select the application → Storage → Change → Memory Map.

Not all apps support portability. System utilities (Google Play Services, MIUI Launcher) and protected games (PUBG Mobile, Genshin Impact) will remain in internal memory.

💡

Moving applications to a memory card can slow them down due to the lower microSD speed compared to the built-in UFS memory.

Frequent problems and their solutions

If the memory card is not recognized or is not functioning stable, check the following points:

• 🔌 Bad contact: Remove and insert the card again, clearing the contacts.
• 🖥️ Incompatible format: Format the card on PC in FAT32 (up to 32 GB) or exFAT (over 32 GB).
• 🔄 Failure in MIUI: Restart your phone or reset your storage settings in Settings → Memory. → Three-pointed → Reset.
• 🛠️ Damaged card: Check it on another device. If it doesn't work, replace it.

If the card is defined but does not record files:

• Check if the "Read Only" mode on the card itself is enabled (the switch on the adapter).
• Make sure there is a free space on the map (minimum 5% of the volume).
• Run error check via PC: Disk Properties → Service → Check.

⚠️ Warning: If the phone starts to brake after formatting the card as internal memory, return it to external drive mode.

7. How to safely remove a memory card from Xiaomi

Failure to remove the card by the rules can lead to data loss or damage to the file system.

1. Open the Settings → Memory.
2. Click on your card name → Extract (or Disable).
3. Wait for the "Safely Extract" notification.
4. Carefully remove the tray with a paper clip.

If the notification doesn't appear, restart the phone before retrieving it, and in extreme cases, turn off the device, minimizing the risk of data corruption.

Exception: If the card is used as internal memory, it cannot be retrieved without completely resetting the phone, in which case transfer all data to another medium before deleting it.

FAQ: Answers to Frequent Questions