How to format properly SD-Map on Xiaomi smartphones: 4 working methods

Formatting SD-cards on Xiaomi, Redmi or POCO — Whether you want to clear the drive before selling, fix read errors, or prepare the card for use as internal memory, it is important to do so without losing data and without harming the file system. Unlike computers where formatting takes a couple of clicks, on Android smartphones, the process has nuances: from choosing the right file system to choosing the right file system (FAT32, exFAT or NTFS) to the risk of turning the card into a “raw” drive, which the device will not see.

In this article, we’ll look at all the current formatting methods, from standard through the phone menu to low-level through Recovery Mode and even using a PC. Particular attention will be paid to the hidden MIUI settings that allow you to format a card as an internal memory (Adoptable Storage), increasing the amount of available space for applications. You will also learn how to avoid typical errors, for example, when the card is determined as corrupted or the phone does not see it.

Preparation for formatting: what to do before the start

Before you click the Format button, follow a few critical steps that neglect can lead to loss of important data or even damage to the memory card.

• 📱 Create a backup: Move all files from SD-Maps to your computer or cloud storage (Google Drive, Mi Cloud). Even if you plan to format quickly, there is always a risk of failure.
• 🔋 Charge the phone: Make sure the battery level is at least 50%. interruption of the process due to discharge can make the card unreadable.
• 🔍 Check the card for errors: If the card is already crashing, try scanning it on your PC using the chkdsk utility (for Windows) or fsck (for PC). Linux/Mac).
• 📏 File system: For cards up to 32 GB is suitable FAT32, from 64GB - exFAT. NTFS Android is supported on a limited basis.

If you format a card for use as internal memory (Adoptable Storage), consider:

• ⚠️ Once formatted, the card cannot be removed and used on other devices without being completely cleaned.
• ⚠️ Some Xiaomi models (e.g. Redmi Note 10 Pro) POCO X3 Pro) may not support this feature on the latest versions MIUI.

⚠️ Attention: If yours SD-The card was previously used as internal memory, and it cannot be formatted by standard means. First, transfer the data back to the phone's internal memory through Settings. → Memory. → Data portability.

2. Method 1: Formatting through phone settings (the easiest)

It is a basic method that is suitable for most users.It requires no additional tools and works on all Xiaomi, Redmi and POCO models running MIUI 12/13/14.

Step-by-step:

1. Put it in. SD-card of the phone slot (if it is external).
2. Open the Files app (folder icon).
3. Go to the Device section or SD-map (depending on version) MIUI).
4. Click on the three dots in the top right corner and select Settings.
5. Slip on the item Format (or Clean on some firmware).
6. Confirm the action by selecting the file system (FAT32 or exFAT).

If there is no “Format” option, try an alternative path:

Settings → Memory → SD- Card → Three dots (menu) → Storage settings → Format

⚠️ Note: Some models (e.g. Xiaomi) 12T or Redmi K50) After formatting through the settings, the card may be identified as corrupt. In this case, use Method 3 (via PC).

Method 2: Formatting as an internal memory (Adoptable Storage)

This method allows us to use SD-It's a card as part of the phone's internal memory, which is useful for installing applications:

• 🔄 The map cannot be retrieved and used on other devices without full formatting.
• ⚡ The speed of work depends on the class. SD-maps (recommended) UHS-I Class 10 or higher).
• 📱 Not all Xiaomi models support this feature on the latest versions. MIUI (for example POCO F4 She may be absent).

Instructions:

1. Put it in. SD-phone-card.
2. When the notice “New” appears SD-Map "slip on it and select Set up a.
3. Choose to use it as an internal memory.
4. Click Format and wait until it is completed (may take up to 10 minutes).
5. After formatting, select Move Data Now or Move it Later.

If the notification does not appear, go to:

Settings → Memory → SD- Card → Three points → Settings → Format as internal memory

💡

If the phone is slowing down after formatting as internal memory, go back to using the card as a portable storage device, and then transfer the data back to internal memory and format the card again through the settings.

Method 3: Formatting with Recovery Mode (for experienced)

This method will be useful if:

• 📵 The phone can't see. SD-map.
• 🔄 The card is defined as damaged.
• 🛠️ You need to perform low-level formatting.

Note: Recovery Mode on Xiaomi does not have a graphical interface for formatting SD-We're going to use maps instead. ADB (Android Debug Bridge).

Steps:

1. Install ADB and Fastboot on PC.
2. Turn on USB Debugging on your phone (Settings → About Phone → MIUI Version → 7 times tap on version → go back to Additional Settings → For developers → Debugging on USB).
3. Connect the phone to the PC and confirm the debugging permission.
4. Open the command line (Windows) or the terminal (Mac/Linux) and type:

adb shell


sm list-disks

You will see a list of disks (for example, disk:179,Please remember your identifier. SD-map.

sm partition disk:179,64 private

Replace 179.64 with your ID, which will format the card as internal memory.

⚠️ Note: Incorrect sm partition command can cause data loss in the phone's internal memory. Use this method only if you are confident in your actions.

5. Method 4: Computer Formatting (most reliable)

If your phone refuses to format a card, the most reliable way is to use a PC, which is also the only option if you want to format a card in NTFS (for example, to write files larger than 4 GB).

For Windows:

1. Put it in. SD-card to card reader and connect to PC.
2. Open This Computer, find your card, right-click and select Format.
3. Select the file system: FAT32 for cards up to 32 GB. exFAT for cards up to 64 GB. NTFS if you need file support >4 GB (but not all Xiaomi devices read it correctly).

Start.

For Mac/Linux:

Use Disk Utility (Mac) or GParted (Linux). In GParted, select a map, click Device → Create a partition table (select msdos for FAT32 or gpt for exFAT), then format the partition.

If standard formatting doesn’t work, try the SD Association’s low-level SD Formatter utility:

1. Download SD Formatter.
2. Select your card in the list.
3. Click Option and select Full (Erase) for full formatting.
4. Press Format.

💡

Formatting via PC is the most reliable way if your phone doesn't see the card or gives you errors. Use SD Formatter to recover damaged cards.

6. Solving common errors after formatting

Even after successful formatting, problems can arise, and here are the most common ways to solve them:

If the card is no longer defined as internal memory after formatting, try:

1. Reboot the phone.
2. Put the card in another slot (if any).
3. Format it via PC in FAT32, then repeat the procedure via phone.

list disk

select disk X

attributes disk clear readonly

7 How to choose SD-Map for Xiaomi: buying tips

Not all. SD-Maps work equally well with Xiaomi devices. Here's what to look for when buying:

• 📌 Speed class: Minimum Class 10 or UHS-I (record 4K-video U3 or V30).
• 📌 Capacity: Up to 32 GB — FAT32 (maximum compatibility. 64-256 GB – exFAT (support for large files).
• 📌 Brand: Preference SanDisk, Samsung, Kingston or Sony. Cheap no-name cards are often forged.
• 📌 Support A1/A2: Marked cards A2 Optimized for application installation (e.g. SanDisk Extreme) A2).

For models with Adoptable Storage support (such as the Redmi Note 9 Pro or POCO X3), cards with high random write rate (A2) are recommended, since they will be installed on many small application files.

Avoid suspiciously low-priced cards, often with fake real capacity less than the stated one. Check the card after purchase using H2testw (Windows) or F3 (Mac/Linux).

FAQ: Frequent questions on formatting SD-maps on Xiaomi