Expanding the internal memory of a smartphone is one of the most common tasks for users who actively shoot high-resolution videos or install a variety of heavy applications. Owners of devices of the Chinese giant often face the question of where exactly the drive is physically inserted and how to set it up after installation. The answer depends on the specific model of your gadget, as the company’s engineers use different design solutions in different price segments.
Modern Xiaomi, Redmi and Poco can have either a combined tray for two. SIM-It's critical to identify the type of tray before you start the procedure, either a separate hidden slot, or not to support memory expansion at all. In this article, we will discuss in detail all possible options for the slot location, the algorithm for correct installation and configuration of the file system.
Definition of tray type and preparation of tools
Before looking for a hole on the body, you need to know exactly what design you will work with. Most budget and mid-budget models, such as the Redmi Note series, are equipped with a universal tray. At the same time, the flagship line Xiaomi Mi or Xiaomi 11/12/13 often lack a memory card slot for the sake of maintaining moisture protection and a thin body.
For work you will need a standard paper clip to extract. SIM-If the device is not original, a thin needle or even a toothpick will do, but you need to use them very carefully so you don't get stuck inside the machine. Visual examination of the ends of the smartphone is the first and most important step of preparation.
- 🔍 Examine the upper and lower ends of the body for the presence of a narrow oblong hole.
- 📱 Check your smartphone model in the official specifications on the manufacturer’s website.
- 🛠 Prepare a soft cloth to put the phone down with the screen during the procedure.
Note that some models may have trays on top and others on bottom, and on moisture-protected devices, trays often come with an additional rubber seal that requires careful handling.
Location of the slot: upper or lower end
Traditionally, Xiaomi engineers have placed a SIM tray and memory cards on the top end of the case, a classic solution that has been common since the days of push-button phones, but in recent years, there has been a trend to move the tray to the bottom end, next to a USB Type-C or Micro-USB connector.
If you can't see the hole on the top, look carefully at the frame on the bottom, often masked as the color of the case and unobtrusively when you look at it. In rare cases, typical of old or specific models, the slot can be combined with a battery, but for modern smartphones this is no longer relevant.
⚠️ Warning: Never try to insert a memory card into a headphone or microphone jack.The diameter of the holes is similar, but the internal design, and you are guaranteed to bring the device down.
You can tell the type of tray from the pattern that's been squeezed out on the surface, if you put the tray out and you see two places underneath it. SIM-cards of different sizes, most likely one of them is combined with contacts for the MicroSD. In some cases, a circuit is used. SIM + 1 MicroSD, where memory cards and SIMs have their own independent cells.
Step-by-step: how to insert the card correctly
The process of installing the drive requires care and adherence to the sequence of actions. Incorrect orientation of the card or brute force can lead to breakage of the contact group. First, make sure that the smartphone is completely turned off, although modern versions of Android and the MIUI shell support hot replacement, you should not risk contacts.
☑️ MicroSD installation algorithm
Take a microSD card and look at it. On one side, it has gold contacts, and on the other side, it has a plastic base. There's a notch on the smartphone tray that replicates the shape of the card. The orientation should be such that the contacts look up (to the screen) if the tray is lying up.
Carefully insert the card into the guides. It should come in tightly, but without undue effort. If the card doesn't come in, don't push it, turn it over or try to rotate it 180 degrees. Once you have the tray in the case, turn the device on.
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Use a plastic card or a special tool to retrieve the tray if the paperclip is lost, but avoid sharp metal objects that can damage the latch mechanism.
Primary configuration and formatting in MIUI
Once the smartphone is turned on, MIUI will automatically detect the new drive. You will receive a notification in the sentence curtain or a pop-up asking you to configure the card. If the automatic window does not appear, you must go to the settings manually through the Settings menu → About Phone → Storage.
The system will offer two options for using memory: as a portable storage or as internal memory. The first option allows you to store photos, videos and music that will be available even after you extract the card. The second option (Adoptable Storage) encrypts the card and makes it part of the system, but applications can run slower.
| Parameter | Portable storage | Internal memory. |
|---|---|---|
| Speed of operation | Standard. | Depends on the class of the card. |
| Access to PC | Direct access | Formatting required |
| Portability | You can move it to another phone. | Tieted to the device. |
| Installation of applications | Limited. | Full support |
Choose the right option and click OK. The formatting process will remove all data from the card, so make sure it doesn't have any important information on it. Once the procedure is complete, the system will be ready to write files.
What if the system does not see the map?
Problems with recognition and their solution
It's quite common for a phone to not see a memory card, and it can be caused by contact oxidation, software failure, or file system incompatibility, often by simply cleaning the card contacts with a soft wipe or an alcohol wipe.
If the card has been used in a camera or other smartphone before, it may have an exFAT or NTFS file system that older Xiaomi models don’t read, which requires formatting via a smartphone menu or on a computer in FAT32 format.
- 🔄 Restart the device after installing the drive.
- 🧹 Wipe the memory card contacts with a soft cloth.
- ⚙️ Check for system updates in the Settings menu → The phone.
⚠️ Warning: If the phone is warming up in the area of the card slot or discharges quickly after installing it, immediately remove the drive.This may indicate a short circuit inside the memory card.
In some cases, the problem lies in the tray itself, if the contacts on the tray are fuzzy or oxidized, there will be no contact with the card. Visually inspect the tray in good light.
Choosing the Best Memory Card for Xiaomi
Not all memory cards are equally useful for smartphones. For stable MIUI and fast video recording in 4K, it is recommended to choose Class 10, U3 or V30 speed cards. Cheap cards without marking can slow down the interface.
Memory also matters. Most current models officially support cards up to 256GB or 512GB, but terabyte drives often work, but using cards larger than 512GB can lead to instability in the file manager.
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To record high-resolution video and install applications, use only cards marked A2 and U3, this will ensure maximum read and write speed.
Brands like Sandisk, Samsung and Kingston have proven to be the most reliable mobile partners, and avoid buying cards in unpackaged markets because the risk of under-packaging is high.