Xiaomi Redmi 4A has been a popular device for many years due to its reliability and affordable price. However, one of its weaknesses is the limited amount of internal storage, which is quickly filled with photos, music and applications. That is why the issue of expanding memory becomes critical for many owners of this model. Using a MicroSD card allows you to significantly increase the free space without having to delete important files.
The process of installing the drive seems simple, but budget models often have nuances with tray and recognition. Installation can cause the device to fail to see the media or damage contacts. In this article, we will discuss in detail how to properly remove the tray, install the desired format card and configure it as a full part of the internal memory of the MIUI system.
Before you do any physical activity, you need to make sure you've got all the tools ready, you need the memory card itself, and maybe a paper clip or a special needle to retrieve the tray, and you need to be careful not to damage the mechanical parts of the smartphone, and then we'll look at each step in detail, including the software setup.
Choosing the right memory card for Redmi 4A
Before buying a drive, it is important to understand the technical limitations of your smartphone. Xiaomi Redmi 4A supports microSD cards up to 128 GB, although many users successfully use 256 GB. The speed of the system depends on the class of card speed, so save on this component is not worth it.
The best choice is Class 10 or UHS-I. Older classes (Class 4 or Class 6) can cause delays when shooting videos or installing apps. If you plan to store heavy games on a map or shoot high-resolution videos, look for A1 or A2 markings, which guarantee high random read speeds.
When buying, pay attention to the originality of the product. The market is saturated with counterfeits that can fail after a month of use. It is better to purchase cards of famous brands in trusted stores, keeping a warranty card.
- 🔹 Choose 32 to 128GB for optimal file system compatibility.
- 🔹 Look for the Class markings. 10 or U1/U3 cardboard.
- 🔹 Avoid cards without contact protection if you plan to use them actively.
- 🔹 Check the packaging for holograms and QR-manufacturer's code.
⚠️ Note: Using poor-quality memory cards can lead to data loss and, in rare cases, overheating of the smartphone power controller.
Slot location and tray extraction
In the Redmi model 4A The SIM card and memory slot is located on the top end of the case, which is a classic location for devices from that release period. SIM-cards and one place for microSD, or hybrid execution, where the second slot is divided between the second SIM and memory. 4A It is usually used as a separate third contact for memory, which is very convenient.
To extract the tray, take a special needle that comes with the kit, or a regular stationery paper clip that is bent in the shape of the letter "G." Insert the tool into a small circular hole next to the tray. Press confidently, but without sharp jerks until you hear a slight click and the tray is pushed out.
It's important not to confuse the tray hole with the noise-cancellation microphone, which is also on the top end. The microphone hole is usually smaller and located closer to the center or edge, rather than directly near the tray frame. If you pressed but the tray doesn't come out, check if you're aiming at the hole.
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If the tray sits tightly in the body, try to slightly shake the needle from side to side, without removing it completely to release the latch of the mechanism.
After extraction, carefully examine the tray. It has necklines of a certain shape that correspond to the contacts of the map. The plastic tray is fragile, so avoid excessive pressure when installing.
Proper installation of MicroSD card
Installing the drive in Xiaomi Redmi 4A requires you to observe the orientation of the contacts. The MicroSD card has a bevelled angle that should coincide with the same protrusion in the smartphone tray. If you try to insert the card on the wrong side, it simply will not fall into the notch until the end.
Put the card in the appropriate compartment of the tray. It should fit tightly and not wobbly. In some cases, you need to slightly press the card with your finger to fix it, but the main mounting is by accurately hitting the slots of the plastic frame. The contacts of the card should be directed downwards (to the inside of the tray) if you look at the tray outside, but in the case of the Redmi 4A, the contacts usually look up when the tray is inserted into the phone.
☑️ Pre-installing check
Once the card is placed, gently insert the tray back into the smartphone. Make sure it enters smoothly, without skewing. If you feel strong resistance, don't push, take out the tray and check the position of the card again. The tray should close level with the device body.
| Parameter | Importance for Redmi 4A | Note |
|---|---|---|
| Type of card | MicroSD / MicroSDHC / MicroSDXC | SD cards without an adapter are not suitable |
| Maximum volume | 128GB (officially) | 256GB is often available but not guaranteed |
| File system | FAT32 / exFAT | NTFS is not supported without root rights |
| Slot location | Upper end | Hybrid or triple tray |
Primary configuration and formatting
After turning on the smartphone, the Android system should automatically detect a new drive. SD-If you don't have a notification, go to the settings manually. To do this, open the Settings menu and find Memory or Storage.
The system will suggest formatting the map, which is a mandatory procedure, because the file system of the card may not be compatible with the requirements of Android. When formatting, all data on the map will be deleted, so if there is important information on it, copy it to the computer beforehand.
You'll see two uses on the storage menu: as a portable storage device or as internal memory. One allows you to store photos, videos and music that you can transfer to other devices. The other option encrypts the card and makes it part of the system partition, allowing you to install applications on it.
⚠️ Note: Once the card is formatted as internal memory, it will only work with that particular smartphone, and you won't be able to insert it into another phone without losing data.
Using the card as internal memory
Memory integration is especially important for Redmi. 4A With its modest 16 or 32 GB of built-in space, to activate this mode, select your storage settings menu. SD-map and click on Storage Settings. Then select Internal Memory (or "Use as Internal Storage").
The system will warn you that you need to speed up the card, if the card is slow, the smartphone may slow down, after confirmation, the formatting and encryption process will begin, which can take from 2 to 10 minutes depending on the size of the drive.
Once the procedure is complete, some of the system data and the application cache will start to be transferred to the new drive, and you will notice that the amount of internal memory available has increased, but it is worth remembering that the card’s speed is still lower than that of the built-in flash memory, so heavy games can take a little longer to load.
- 🔸 Transfer media files and documents to the map to free up the system partition.
- 🔸 Not all applications support the transfer to SD-map, it depends on the software developer.
- 🔸 When resetting your phone settings, the data on the formatted card will also be deleted.
- 🔸 To retrieve the card in this mode, you will first need to format it back into portable mode.
If you decide to return everything as it was, simply select the option to Format as a portable storage from the map menu, and the system will suggest transferring the data back to the phone before converting.
Solution: Card not determined
Sometimes, once installed, the map doesn't show up in the system. First of all, check if the tray is sitting tight. Remove it and wipe the contacts of the card with a soft wisp or a dry lilaless wipe. Contact oxidation is a common cause of failure.
The second step is to check the format. If the card was used on a computer or other device, its file system may be NTFS or have errors. Try formatting the card on your computer in FAT32 (for cards up to 32 GB) or exFAT (for cards over 32 GB).
Secret method of checking the card
The problem may also be in the tray itself: Contacts inside the smartphone may have oxidized or bent, visually inspect the slot in good light, if the contacts are bent, gently correct them with a thin needle, before turning off the device.
Rarely, you need to update your smartphone firmware. Go to Settings → About Phone → System Update and check for new versions of MIUI. Updates often include driver fixes for the memory controller.
Safe extraction and maintenance
While modern smartphones support hot card swaps, Android recommends using software extraction, which prevents data loss if you're writing at the time of pulling out, go to the storage settings and click Extract or Disable next to your card name.
Once you get confirmation from the system, you can safely retrieve the tray. Check the status of the card regularly. Every six months, it is recommended to connect it to your computer and run an error check through the disk properties in Windows or utilities like H2testw.
Don't store memory cards in places with high humidity or near magnets. Despite the protection, electronics are sensitive to external influences. If you rarely use the card, store it in the original plastic case.
⚠️ Warning: Never remove a memory card while recording a video, installing app updates, or copying files – this is guaranteed to damage the file system.
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Regular backup of data from a memory card to a computer or to the cloud is the only way to ensure the safety of photos and documents in the event of a sudden failure of the drive.