How to put a memory card in a Xiaomi phone: from selection to settings

Expanding Xiaomi’s memory with a microSD card is one of the easiest ways to solve the problem of space shortage for photos, videos and applications. However, many users face difficulties: the slot is not detected, the card is not formatted, the applications refuse to move. In this article, we will discuss all the steps from choosing the right memory card to its correct setting in Redmi, POCO and other Xiaomi phones.

We will focus on the hidden settings of the MIUI, which allows you to use the card as an internal storage (Adoptable Storage) – a feature not available on many other Android smartphones. Also, we will explain why some models (for example, Xiaomi 12 Pro or Redmi Note 11 Pro+ 5G) do not support memory expansion, and what to do in such cases.

1. Compatibility Check: Does your Xiaomi support memory cards?

Not all Xiaomi smartphones are equipped with a microSD slot. For example, flagship models (Xiaomi 13 Ultra, Mix Fold 2) often lack this option for the sake of a thin body or waterproof. To avoid errors, check:

• 📱 Budget and mid-budget models (Redmi 10A, POCO M4 Pro, Redmi Note 12) – almost always have a slot (hybrid or dedicated).
• 💎 Flagships (Xiaomi 12S, Black Shark 5 Pro) – usually slot-free, but there are exceptions (e.g. Xiaomi 11 Lite 5G NE).
• 🔄 Hybrid slots (e.g., in the Redmi Note 11 Pro) – you have to choose between a second SIM- card or a microSD.

You can check the presence of the slot:

1. In the characteristics on the official website of Xiaomi (section "Memory").
2. Visually, the slot is usually located on the left end next to the tray for the SIM- cards.
3. Through Settings. → The phone. → Characteristics (if there is a clause "External memory").

⚠️ Warning: In hybrid slot models (e.g. Redmi 9T), a microSD setup will block the second SIM- card, and if you want two SIMs, you have to choose between them and the extra memory.

2. Memory card selection: what size and class is suitable for Xiaomi

Not all microSD cards work equally well with Xiaomi smartphones.

For most tasks, the best choice is SanDisk Ultra microSDXC UHS-I U1 128 GB or Samsung EVO Plus U3 256 GB. If you plan to shoot video in 4K@60fps, take cards labeled V30 or V60.

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Before buying, check the card for authenticity using the SD Insight app (available on the Play Market) that will show the real-life manufacturer and the memory chip model.

Avoid cards that say “For Dash Cam” or “For Surveillance” – they are optimized for cyclic recording and can quickly fail in your smartphone.

3. Installation of a memory card in a smartphone: step-by-step instructions

The process of installing a microSD in Xiaomi depends on the type of slot.

🔹 Dedicated slot (separate from SIM- cards)

There is a slot in the Redmi 10C or POCO M5, for example.

1. Turn off the phone (optional, but recommended)

2. Find a slot on the end of the case (usually on the left)

3.Put the paperclip into the tray hole and remove it

4. Put the microSD in the appropriate groove (contacts down)

5. Put the tray back in place before you click-->

🔹 Hybrid slot (combined with SIM- card)

In models like Redmi Note 11S or Xiaomi 11 Lite NE, you will have to sacrifice a second SIM- card.

1. Open the tray for the SIM- cards (use the staple from the kit).
2. Remove the second SIM- card (if installed).
3. Insert the microSD into the SIM 2 slot (usually signed or marked in a different color).
4. Make sure the card sits tightly in the slots - it should not hang around.

After installation, turn on your phone. MIUI should automatically detect the card and prompt it to be configured. If this does not happen, go to Settings → Memory and click "Configure".

4. Memory card setup: external storage vs internal memory

The MIUI system offers two microSD options:

1. Portable storage – the card is used as a removable drive (photo, music, documents).
2. Adoptable Storage – The card becomes part of the system and can be used to transfer applications.

The choice depends on your tasks:

To set up the card as an internal memory:

1. After installing the card, go to Settings → Memory.
2. Click on the name of the card (for example, SD-128GB card).
3. Select "Configure as internal memory".
4. Confirm the formatting (all data will be deleted!).
5. Wait until the process is completed (it can take 5-15 minutes).

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Setting up the card as internal memory is irreversible without full formatting, and then it can't be read on a PC or other phone without first resetting.

⚠️ Warning: Some apps (like WhatsApp or Google Play Services) can't be migrated to a memory card even when configured as internal storage. This is a limitation of Android, not MIUI.

5. Transfer data and applications to a memory card

If you set up a card as an internal memory, you can transfer some of the applications and data to it.

📱 Application portability

1. Open Settings → Applications → Application Management.
2. Select the app you want to migrate (like Facebook or Spotify).
3. Press "Storage" → "Change".
4. Choose "SD-map" and confirm the transfer.

Not all apps support portability. If the Change button is inactive, the developer has banned the option.

📁 File transfer (photo, video, music)

To move media files:

• 📷 Use Gallery: highlight files → “More” → “Move” → select a memory card.
• 🎵 For music: open Mi Music → "My Music" → long tap on track → "Move".
• 📄 For documents, use Files (Google App) or Mi File Manager.

To automatically save new photos and videos to the map:

1. Open the chamber.
2. Press on. ⚙️ "Settings" → "Preservation site".
3. Choose "SD-map".

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To save space on internal memory, set up automatic saving of messengers (such as Telegram or Viber) on the card. To do this, open the settings of the messenger → Memory and data → Download folder.

Frequent problems and their solutions

Even after installing memory cards correctly, Xiaomi can have problems.

🚫 Map not determined

• 🔌 Check if it's tightly inserted into the slot.
• 🔄 Reboot the phone.
• 🛠️ Format the card on PC in FAT32 (if the volume is up to 32 GB) or exFAT (if larger).
• 📱 Update MIUI to the latest version (old firmwares have bugs with SD- cards).

⚠️ The map is slow.

If the speed of reading/writing has dropped:

• 🧹 Clear the card of unnecessary files (over 90% of the totality reduces the speed).
• 🔄 Reformat the map (pre-copy the data!)
• 🛒 Replace the card with a higher class model (e.g., with U1 with U3).

🔒 Card locked (requests password)

If the card was previously used in another phone as an internal memory:

• 📱 Connect it back to the old device and execute "Safe Removal."
• 🔄 Format the card on PC (all data will be deleted!).
• 📞 If the card is locked by a PIN- code, try the standard combinations: 0000, 1234 or look in the card documentation.

7. Optimization of memory card operation in MIUI

To make the memory card last longer and work more stable, follow these tips:

• 📵 Safe extraction: Always use the "Extract" option in the memory settings before physically deleting the card.
• 🔋 Do not retrieve the card when the battery is low (less than 15%).
• 📊 Regularly check the health of your card using apps like SD Card Tester or A1 SD Bench.
• 🚫 Do not use a card to store system backups (for example, through Mi Cloud).

To speed up the card as internal memory:

1. Turn off Adaptive Brightness in the screen settings (saves system resources).
2. Limit the number of background processes: Settings → Permissions → Autostart.
3. Use "Light Mode" in MIUI (Settings → Additional → Light Mode).

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If the card is used as internal memory, do not remove it without first turning off the settings. This can cause the system to crash and the phone to be reset!

8.Memory Card Alternatives for Xiaomi

If your Xiaomi model doesn’t support microSD (like the Xiaomi 13 Pro or Mix 4), consider other ways to expand memory:

• ☁️ Cloud storage: 📁 Mi Cloud (5GB free, integrated into MIUI). 📁 Google Drive (15GB free). 📁 Yandex Drive (10GB free for new users).
• 🖥️ External drives: USB- flash drives with an adapter OTG (supported by most Xiaomi models) Portable SSD- drives (e.g. Samsung T7 Shield).
• 🔄 Internal Memory Optimization: Remove the app cache to Settings → Memory → Cleanup. Move media files to the cloud (e.g. enable Autoboot in Google Photos). Use the "Lite versions" of apps (e.g. Facebook Lite or Messenger Lite).

To connect external drives through OTG:

1. Buy a USB-C → USB-A adapter (or Micro-USB → USB-A for older models).
2. Connect the flash drive or SSD to the adapter and then to the phone.
3. In the notification that appears, select "Use as" USB-accumulator".
4. Manage files through Mi File Manager or Google Files.

Note that the speed of work through OTG depends on the version of USB in your phone. For example, Xiaomi 12T Pro supports USB 3.2, and Redmi 9A only USB 2.0, which limits the data transfer speed.

FAQ: Answers to Frequent Questions