How to insert a memory card in Xiaomi Redmi 4: instructions with photos and nuances

Why Redmi 4 owners choose memory cards and when they really need them

Xiaomi Redmi 4 (including the Pro, Prime and standard versions) is still a popular choice due to its price-performance balance, but its built-in memory — from 16 GB to 64 GB — often becomes a bottleneck for active users. High-resolution photos, videos, instant messengers and games quickly fill the internal storage, and a hybrid slot for the user. SIM-Redmi 4 requires you to sacrifice a second SIM for microSD.

Inserting a memory card seems like a simple procedure, but there are pitfalls here, from format incompatibility (FAT32 vs exFAT) to physical damage to contacts when installed carelessly, and this article will help you avoid typical errors, pick the best card and install it correctly — especially with Redmi 4.

Before you get to the instructions, answer the key question: do you need a memory card at all? If you store files in the cloud (Google Drive, Mi Cloud) and do not download heavy games, it may be enough to clear the cache and transfer the photo to the PC.

• 📸 You're shooting a video in Full. HD or 4K (Even on Redmi 4, it's possible through third-party cameras);
• 🎮 Install games with a weight of 1 GB (Genshin Impact, Call of Duty Mobile);
• 📂 Work with large databases or offline maps (Google Maps, 2GIS);
• 🎵 Keep local music in high bitrate (FLAC, 320 kbps),

So you can't do without microSD. And then you can do it with a step-by-step guide that takes into account all the nuances of the model.

Which memory card to choose for Xiaomi Redmi 4: technical requirements

Not every microSD is suitable for Redmi 4. The manufacturer claims support for cards up to 256 GB, but in practice with volumes over 128 GB, problems can arise from slow writing to completely ignoring the drive system.

⚠️ Note: If you plan to install applications on a memory card (via Settings) → Annexes → Move it to SD), Choose cards with markings A1 or A2 (Without it, games and programs will be slowed down.

Before buying, check the card for authenticity with H2testw (Windows) or F3 (Linux/macOS). Counterfeiting often has a real volume of 2-4 times less than stated. For example, "128 GB" actually turns out to be 32 GB with a rewrite cycle.

💡

If you buy a used memory card, format it in exFAT via a PC before first using it, which will remove possible viruses and junk files from the previous owner.

Preparing Your Phone: What to Do Before Installing a MicroSD

Putting a memory card in Redmi 4 on hot is a bad idea. Follow this checklist to avoid crashes:

Pay special attention to the hybrid slot. In Redmi 4, it is combined with a tray for the second. SIM-- Slot 2. - That means:

• 📶 If you use two of them SIM-You have to sacrifice one of these for the microSD.
• 🔄 The memory card cannot be inserted simultaneously with the second SIM — just one thing.
• 📱 Redmi 4 Pro and Redmi 4 Prime slots are identical, but in Redmi 4A He's gone!

⚠️ Attention: If you are extracting SIM-MicroSD card, write down its parameters (ICCID, phone number) or take a picture. Re-installation may require re-registration on the operator's network (especially for MTS and Tele2).

We also recommend that you copy important data from your phone to your PC or cloud in advance, and Redmi 4 may suggest formatting it when you first connect your card, which will delete all files.

Step-by-step: how to insert a memory card in Xiaomi Redmi 4

Now, let's get to the practice. You're going to need to do this.

• 🔧 Paperclip or special key to extract the tray (comprised with the phone).
• 📱 MicroSD memory card (not miniSD or microSD card) SD!).
• 🕯️ Good lighting – slot contacts are small, easy to damage.

Follow the algorithm:

1. Turn off your phone (press the power button → "Switch off"). Do not use Reboot mode!
2. Find a card slot: it is located on the left end of the case (if you look at the screen).
3. Remove the tray: Insert the paperclip into a small hole next to the slot. Push until you click, the tray will extend 1-2 mm. Gently pull it over yourself.
4. Install a memory card: Place the tray on a flat surface with contacts up. Place the microSD in the top slot (above) SIM-Make sure that the bevelled corner of the card matches the slot in the tray.
5. Put the tray back in before you click. Don't use excessive force!
6. Turn on your phone and wait for the card to be recognized (usually 10–30 seconds).

📌 If the phone can’t see the card, try it:

• 🔄 Reset the device.
• 🔧 Carefully remove and insert the card again (possibly contacts do not touch).
• 🖥️ Check the card on another device (PC, other phone).

Configuring a memory card after installation: formatting and use

After the first connection, Redmi 4 will offer you to configure the map.

1. Used as a portable storage device: 📁 The card will be available for storing files (photos, videos, music). 🚫 You can't put apps on it. 🔄 You can retrieve and connect to other devices.
2. Used as an internal memory (Adoptable Storage): 📱 The map becomes part of the system (partition) /data). ✅ You can move the apps to it. ⚠️ You can't extract it, the data will be erased! 🔒 After formatting, the map will not be read on PC.

For most users, the first option is optimal, the second one is only suitable if you are sure that you will not retrieve the card and are ready to risk data loss in case of failure.

If you've chosen internal memory, the phone will suggest formatting the card, which will take 5-10 minutes. Don't interrupt it, it can damage the file system.

1. Go to Settings. → Memory.
2. Click on the memory card. → "Transfer data".
3. Select files to move (photo, video, audio).

💡

Formatting the card as an internal memory is irreversible for other devices, and if you decide to embed it in another phone or PC, you'll have to format it again, losing all the data.

Typical problems and their solutions

Even if you install it properly with your memory cards, Redmi 4 can crash.

⚠️ Warning: If the memory card starts to "sweep" errors (for example, files disappear or get corrupted), immediately copy all data from it. This is a sign of physical wear - such cards "die" suddenly, without the possibility of recovery. The average life of a microSD is 3-5 years with active use.

Another common problem is that the phone asks you to format the card every time you connect, and it's because:

• 🔌 Unstable contact in the slot (try to bend the card contacts gently with a thin needle).
• 🖥️ File system conflict (e.g., the card is formatted into a file system) NTFS PC-only).
• 🦠 Viruses (scan the card with antivirus before using).

How to safely remove a memory card from Redmi 4

It's not enough to just pull a card out of your phone. Incorrect extraction can lead to:

• 📛 Loss of data (if there was a recording at the time of extraction).
• 🔧 Damage to the file system (the card will become invisible").
• 📵 Apps crash if they used files from the card.

The correct algorithm:

1. Open the Settings → Memory.
2. Click on the memory card icon → “Extract” (or “Safe Retrieval”).
3. Wait for the notification "Card can be removed".
4. Turn off your phone (required!).
5. Remove the tray and remove the card.

⚠️ Warning: If you use the card as an Adoptable Storage, it cannot be retrieved without completely resetting the phone:

• 📱 System freeze on next activation.
• 🗑️ Losing all the data on the map.
• 🔄 Need to reset before factory settings.

If you need to retrieve a card formatted as internal memory:

1. Create a backup of data through Settings → Additional → Backup.
2. Go to Settings → Memory → SD card.
3. Click on “Format as a portable storage” (all data will be deleted!).
4. The map can now be safely retrieved.

FAQ: Frequent questions about memory cards in Xiaomi Redmi 4