Setting up SD-Xiaomi Redmi 9 maps: from formatting to optimization

Introduction: Why is it necessary SD-Map in Xiaomi Redmi 9?

Smartphone Xiaomi Redmi 9 his 32/64 GB of internal memory quickly fills up with photos, videos and applications – especially if you actively use instant messengers or play mobile games. SD-The microSD solves the problem of space shortage, but it needs to be configured correctly. Without the right setup, the card can run slowly, do not save data or even damage files.

In this article, we will discuss all the ways of using SD-Redmi 9 cards: how to format it for internal memory (Adoptable Storage), how to make a portable drive, what errors occur when setting up and how to fix them, UHS-I) Why cheap drives can slow down your smartphone.

Important: the instruction is relevant for MIUI 12/13/14 based on Android 10/11, which are on Redmi 9 by default. If you have custom firmware, some menu items may differ.

What? SD-Choose a map for Xiaomi Redmi 9?

Not every microSD is suitable for expanding the memory of a smartphone. Redmi 9 supports cards up to 512 GB, but there are nuances:

• 🔹 Speed class: minimum class 10 (10 MB/s, better. UHS-I U1 (10–30 MB/s) or U3 (30+ MB/s. Class cards 4/6 will slow down when recording video or installing applications.
• 🔹 Format: only FAT32 (up to 32 GB or exFAT (64 GB). NTFS unsupported!
• 🔹 Brands: reliable options – SanDisk Ultra, Samsung EVO, Kingston Canvas – Cheap no-name cards are often forged (the actual amount is less than the stated amount).
• 🔹 Application Performance Class: Look for a tag to install applications A1 or A2 — These cards are optimized for randomly writing small files.

⚠️ Note: If you plan to use the card as an internal memory (Adoptable Storage), its speed should be at least lower. UHS-I U1. Otherwise, the system will be laid down, and applications will be slowly opened.

Preparation SD-Maps: Formatting before use

New SD-The card may be formatted incorrectly or contain service files from the manufacturer:

1. Insert the card into the Redmi 9 slot (a hybrid tray for 2 SIM + microSD or 1 SIM + microSD).
2. Connect your smartphone to charging – formatting can take up to 10 minutes, and discharging during the process will lead to errors.
3. Open the notification about the new card (appears in the curtain) or go to Settings → Memory. → SD-map.
4. Select "Configure" (or "Format").

The system will offer two use cases:

• 📱 Adoptable Storage – the card becomes part of the system, you can install applications on it.
• 📁 Portable storage – the card is used only for storing files (photos, videos, music).

⚠️ Note: Forming as internal memory, all data on the map will be deleted without recovery, and the map will not be read on other devices (PC, camera) without full formatting.

Setting up SD-The card is an internal memory (adoptable storage)

This mode allows you to expand the built-in memory of the smartphone due to SD-The apps, games and system files will be saved automatically to it. Importantly, once set up, the card cannot be retrieved without resetting the phone to factory settings!

Step-by-step:

1. Go to Settings. → Memory. → SD-map.
2. Press Set up. → Internal memory.
3. Read the warning and tap Clean and format.
4. Wait until the process is completed (it can take 5-15 minutes).
5. After formatting, click Transfer Data to move some files from the built-in memory to SD-map.

What happens when you set up:

• 🔧 The card is encrypted and communicates with the device (will not work on other gadgets).
• 📦 Some of the system applications are automatically transferred to it.
• 🔄 In Settings → Apps will be able to choose where to install new programs.

⚠️ Attention: If you extract SD-A card formatted as internal memory, Redmi 9 may stop downloading or lose application data.Always back up before retrieving!

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After setting up Adoptable Storage, restart your smartphone, which will help the system correctly distribute cache and temporary files between the internal memory and the storage. SD-card.

Use of the SD-card-carrying

If you need a card only for storing files (photos, videos, documents), select portable storage mode.

• 📂 The map will appear as a separate disk in the file manager.
• 🔄 It can be extracted and connected to other devices (PC, laptop, camera).
• 🚫 You can’t install applications on it (only save media files).

How to set up:

1. Put the card in your smartphone.
2. In the notification or in Settings → Memory, select Setup → Portable Drive.
3. Format the card in FAT32 (up to 32 GB) or exFAT (up to 64 GB).
4. After formatting, the map will be ready for use.

How to make the card the default save place:

• 📸 For photo/video: Open the camera → Settings → Preservation site → SD-map.
• 🎵 For music/downloads: in the Downloads or Music app, select the folder on SD-map.

Common mistakes and their solution

When you set up SD-Redmi 9 cards are often problematic for users:

• 🚫 "SD-Card damaged" Reason: incorrect extraction, formatting failure or fake card Solution: format the card on a PC in the computer FAT32/exFAT, Then reset the setting on your smartphone. If the error persists, the card is faulty.
• 🐢 "The phone brakes after connecting SD-Reason: Low speed of card writing (Class) 4/6). Solution: Replace the card with UHS-I U1/U3 Use it only for file storage (not as internal memory).
• 🔄 "Applications are not installed on SD-The reason: the card is formatted as a portable drive or does not support A1/A2. Solution: reformat the card to internal memory mode or install only light applications (messengers, games before). 1 GB).
• 📵 "The smartphone can't see. SD-The reason: poor contact in the slot, pollution or incompatible format (NTFS). Solution: wipe the contacts of the card with alcohol, check the slot for the presence of garbage, format the card in exFAT.

⚠️ Note: If after setting up Adoptable Storage smartphone began to warm up or discharge quickly, check the card for authenticity using the utility H2testw (Windows or F3 (Linux/macOS). Fake cards with low speed can overload the memory controller.

Optimization of work SD-maps on Redmi 9

To make the card work faster and last longer, follow these tips:

• 🔋 Do not remove the card while recording (for example, when shooting a video or installing applications.
• 🧹 Clean the cache regularly: go to Settings → Memory. → Cleaning and removing unnecessary files.
• 🔄 Transfer applications manually: to Settings → Apps select the program and click Storage → Change. → SD-map.
• 📊 Monitor the space available: leave at least 10% of the free space, otherwise the recording speed will drop.

How to speed up the card in Adoptable Storage mode:

1. Turn off automatic updates to apps in Google Play (they will be downloaded to internal memory).
2. Install only lightweight applications on SD-card (e.g. Telegram, VK, Waze. Heavy games (Genshin Impact, Call of Duty Mobile) are best left in the internal memory.
3. Turn on the option Optimization of memory in Settings → Memory.

⚠️ Attention: If you are using SD-The card is like internal memory, do not update it. MIUI Recovery with the card connected, which can lead to data loss.

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For maximum productivity, use SD-class UHS-I U3 tagged A2. These cards are optimized for installing applications and randomly writing small files.

FAQ: Answers to Frequent Questions