How to format a memory card in a Xiaomi phone: 3 proven ways

Why Xiaomi Memory Card Formatting Needs a Special Approach

MicroSD cards in Xiaomi smartphones are often a source of problems, from reading errors to the sudden disappearance of files. The reason lies not only as a drive, but also in the features of the MIUI firmware. Unlike other brands, formatting through a standard menu can lead to incomplete cleaning of memory cells, which subsequently causes failures when writing new data.

Another feature is that Adoptable Storage is supported in some models, and if the card was previously used in this mode, simply formatting it through the phone will not return it to its original state, requires a full reset via Recovery or external utilities, and in this article we will discuss all the current methods, including the hidden functions of MIUI 14/15, which are not documented in the official instructions.

It is important to consider the file system: Xiaomi by default offers FAT32, but for cards over 64 GB, exFAT is optimal. The latter option is supported by all modern models (starting with the Redmi Note 8 Pro), but can cause compatibility problems when connecting the card to old devices or car radios.

When to format a memory card in Xiaomi

Not every slowdown or reading error requires a complete formatting, but here is a checklist of situations where the procedure is really necessary:

🔄 The map is determined, but the files are not opened ("damaged file")

🐢 Write/read speeds down by more than 50% (checked through AndroBench)

📛 The phone is giving you a notification "SD-The map is damaged?"

🔌 The card is not recognized after being removed from another device.

📱 Applications cannot save data to the card (no access error")-->

If the problem is one-time (e.g., one file is not opened), try checking for errors through the PC first using the CHKDSK utility (command: chkdsk D: /f /r, where D: is the letter of the card disk). Formatting is a last resort, since it completely erases data, including hidden system files that MIUI creates to work with the card.

⚠️ Note: If the card was used in Adoptable Storage mode (as part of internal memory), formatting it through standard phone means will cause a failure, in which case you need to reset via Recovery or utility. SD Card Formatter on PC with the option of Overwrite format.

Method 1: Formatting through Xiaomi Settings (for most users)

The simplest method that is suitable for cards that are not used in expandable memory mode is the instruction is relevant for MIUI 12-15:

1. Open Settings → Memory (or Storage in new versions).
2. Tap the line. SD-card (if not, check if the card is inserted correctly).
3. In the upper right corner, press three dots (⋮) and select Storage Settings.
4. Select Format → Format as internal (if you want to expand memory) or Format as portable (for normal use).
5. Confirm the action. It takes 30 seconds to a few minutes, depending on the size of the map.

Once completed, the phone will automatically restart, and if the card is formatted as an internal card, all data from it will be transferred to /sdcard/Android/obb (this is normal, as MIUI reserves system files).

💡

If you don't define the card after you format it, reboot the phone and paste it back in, and 30 percent of the time, that solves the initialization problem.

Method 2: Recovery Mode Formatting (for error cards)

This method will be useful if:

• 📵 The card is not formatted through the standard menu (the error "failed to format" is not available")
• 🔄 The card was previously used as an internal memory and is now unrecognizable.
• 🛠️ You need to completely clear the card from system files MIUI

Instructions:

1. Turn off the phone.
2. Press Volume Up + Power before the Mi logo appears (on some models – Volume Up + Volume Down + Power).
3. In the Recovery menu, select Wipe & Reset → Wipe SD Card (navigation is done with volume buttons, the choice is with the power button).
4. Confirm the action and wait until it is completed (may take up to 10 minutes).
5. Restart your phone through Reboot → System.

⚠️ Note: On some models (Redmi Note 10 Pro, POCO F3) wipe SD Card is not in standard Recovery. In this case, use custom Recovery (for example, use custom Recovery, TWRP) or method 3 via PC.

Method 3: Formatting via PC (the most reliable method)

If the phone refuses to format the card, the best option is to use a computer, which allows you to select a file system (FAT32, exFAT or NTFS) and perform complete erasure (rather than quick formatting).

You'll need:

• 💻 Computer with Windows/macOS/Linux
• 🔌 Cartridge (built-in or external) USB)
• 📥 Utility. SD Card Formatter (official utility from the SD Association or DiskPart (built into Windows)

Instructions via SD Card Formatter:

1. Download the utility from the official website and install.
2. Insert the card into the card reader and connect to the PC.
3. Start the program, select your card in the Drive list.
4. In the Formatting options section, select Quick format – fast (does not erase data completely) Overwrite format – complete (recommended for errors)

Press Format and wait until it is completed.

Instructions via DiskPart (for experienced users):

diskpart


list disk




select disk X (where X is your card number)




clean




create partition primary




formats fs=fat32 quick (or fs=exfat for cards >64 GB)




assign




exit

💡

For cards with 64GB or more, always choose exFAT, which will eliminate the 4GB file size limit and increase write speeds by 10-15% over FAT32.

Mistakes in Xiaomi Memory Card Formatting and Their Solutions

Even when following instructions, users encounter errors, and here are the most common ways to fix them:

If the card stopped being determined after the MIUI upgrade to version 14.0.5 and higher, the problem may be with the new memory controller driver: Reverse the firmware to version 13.0.9 or use the card only in portable storage mode.

Through phone settings

Through Recovery Mode

PC (SD Card Formatter/DiskPart)

Never formatted.-->

How to recover data after formatting a memory card

If you formatted the card by mistake, the chances of recovering data depend on the type of formatting:

• 🔄 Fast Formatting: Files can be recovered with 70-90 probability%.
• 🧹 Full formatting: the odds drop to 20–30%, especially if new data is recorded on the map.

Instructions for remediation:

1. Stop using the card immediately (do not write new files to it!).
2. Connect the card to the PC through the card reader.
3. Use one of the programs: Recuva (free, easy recovery), EaseUS Data Recovery (paid, high efficiency), PhotoRec (free, works with any file systems)

Select a card from the list of devices and run a deep scan.

Save the recovered files to your PC hard drive (not to the card!).

⚠️ Attention: Recovery programs often find fragments of deleted files, but their integrity is not guaranteed. HEIC (used by Xiaomi by default) – they are only partially restored. To avoid losses, set up automatic backup in Settings → Google → Backup.

FAQ: Frequent questions about Xiaomi memory card formatting