Why Xiaomi phone memory is full, even though there is nothing there: we analyze the system causes and methods of cleaning

You open your Xiaomi smartphone settings to download a new app or take a photo, but suddenly you see a notification saying, "Memory is full," and the gallery is empty, and the list of installed programs is only a couple of messengers. The situation is familiar to many owners of Android devices, especially budget models Redmi or POCO with 32-64 GB of memory. What is the reason for this behavior of the system and how to return free space without resetting to factory settings?

Xiaomi’s invisible memory filling problem is related to the way MIUI works, the manufacturer’s proprietary shell. Unlike pure Android, it aggressively caches data, creates duplicate files to speed up work, and hides system folders from the user. In addition, many applications (including standard ones) save temporary files that are not displayed in the standard file manager. In this article, we will discuss the 7 main causes of memory overflow and give step-by-step instructions for eliminating them, from cleaning the cache to removing unnecessary MIUI updates.

Important: If your Xiaomi smartphone is giving you a memory shortage error, but the storage settings show that 10-20% is another /data partition problem, and it requires root rights or firmware, and we'll look at it separately.

1. App cache and system junk: why they are "eating" gigabytes

The most common reason for invisible memory filling is the application cache, and each program (even the system) saves temporary files to speed up work: messengers cache photos from chat rooms, browsers cache pages from sites, games textures and levels. In MIUI, the cache is not automatically cleared, and its volume can reach 5-10 GB on active devices.

The problem is compounded by the fact that many applications (such as Facebook, TikTok, or Google Play Services) create hidden folders in the root directory that do not appear in the standard file manager.

• 📱 WhatsApp, Telegram and Viber save all media files from chats to folder /storage/emulated/0/Android/media/. Even if you delete a photo in the gallery, it can stay here.
• 🌐 Browser cache: Chrome, Mi Browser and Firefox store copies of visited pages, cookies and autocomplete data.
• 🎮 Cash games: Mobile games (for example, PUBG Mobile or Genshin Impact download additional resources that remain even after the game is deleted.
• 🔄 System cache MIUI: The shell creates temporary files for animations, themes and widgets. /data/system_package_cache/ and not visible without root.

How to check cache volume? Go to Settings → Applications → Application Management, select any application, and see the Storage section. If the cache takes more than 500 MB, it's time to clear it.

2. Hidden folders and files: where to look for "invisible" garbage

In MIUI, many system and user files are hidden by default, and this is done to protect data, but often leads to the user not seeing what is taking up memory, such as the.thumbnails folder that stores thumbnails of all photos and videos, even if the originals are long removed, and can be as large as 1-3 GB.

Other “problematic” hidden folders:

To see hidden files, use a file manager that supports the display of hidden folders (for example, Solid Explorer or Solid Explorer). FX File Explorer. In the standard manager MIUI This function is not.

⚠️ Note: Do not delete Android folders, MIUI/backup Or Alipay (if you use Chinese firmware), which can cause system failures or data loss.

3 MIUI Updates: Why They Take Place Even After Installation

Xiaomi regularly releases updates for its shell MIUI, But many users are unaware that these updates are not automatically deleted after installation. 1,5–3 GB each) stay in the folder /cache or /data/ota_package, squander.

MIUI also saves delta updates, small patches that are downloaded to speed up the installation of new versions, which can be up to 500-800MB.

How to check and remove old updates:

1. Open Settings → About the phone → Update MIUI.
2. Click on the three dots in the top right corner and select “Remove downloaded service packs”.
3. Confirm the removal. This will free up space occupied by older versions of firmware.

If this method doesn’t work, use a root-access file manager (such as Root Explorer) and manually delete the folder contents:

/cache/


/data/ota_package/




/data/miui/ota/

⚠️ Note: Do not delete files from the folder /data/ota_package, If you're currently downloading an update, it could cause a system crash.

4 Log files and dumps: why the system creates gigabytes of “junk”

Log files (error logs) and memory dumps (system state snapshots when crashes) are another source of invisible memory filling, which in MIUI are created automatically and can take up to 2-5 GB if the device is rebooted frequently or debugging services are running.

Where to look for logs:

• 📁 /data/anr/ — application error tracing (ANR — Application Not Responding).
• 📁 /data/tombstones/ — memory dumps in critical failures.
• 📁 /data/log/ — System Logs (including Logistics) MIUI and Google Services).
• 📁 /sdcard/MIUI/debug_log/ — Debugging Logs (if developer mode is enabled).

You can delete these files only with the help of ADB (Android Debug Bridge) or file managers with root access.

1. Connect your phone to your PC and enable USB debugging (Settings → About Phone → MIUI version – press 7 times, then go back to Additional Settings → For Developers).
2. Open the command line on your PC and type in: adb shell su rm -rf /data/anr/* rm -rf /data/tombstones/* rm -rf /data/log/*
3. Reset the device.

If you don’t have root rights, the only way to reduce the amount of logs is to disable debugging modes and reduce the level of logging in the developer settings.

💡

If your Xiaomi reboots frequently or issues errors, back up via Settings → Additional Settings → Backup and Reset before clearing your logs.

5.Duplicate files and “junk” from MIUI: how to find and delete

MIUI is known for creating duplicate files to speed up access, for example, when editing a photo in a standard gallery, the original file is saved, and the modified version is created as a new file, the same thing happens with uploaded documents, music and videos.

Where to look for duplicates:

• 🖼️ /storage/emulated/0/DCIM/.thumbnails/ — Photo miniatures (may duplicate the originals).
• 🎵 /storage/emulated/0/Music/ — duplicates of audio files from messengers.
• 📄 /storage/emulated/0/Download/ — Reuploading the same files.
• 📁 /storage/emulated/0/MIUI/Gallery/cloud/ — cloud-album cache.

Use specialized applications to find duplicates, for example:

• Files by Google (built-in cleaning function)
• Duplicate Files Fixer (scans by content, not name)
• SD Maid (seeks duplicates and junk files)

If there are too many duplicates, try turning off automatic backups in the MIUI gallery:

1. Open the Gallery → click on three points → Settings.
2. Select Cloud Album → Turn off Auto Sync.
3. In the Local Album section, turn off Creating Miniatures.

6 System Apps and Bloatware: What You Can Uninstall Without Risk

Xiaomi preinstalles dozens of system applications on its smartphones, many of which cannot be removed by standard means. These programs (for example, Mi Video, Mi Music, Mi Browser) take up space and work in the background, even if you do not use them.

Some applications can be disabled or removed without root rights:

To remove system applications without root, use ADB:

1. Connect your phone to your PC and enable debugging via USB.
2. Open the command line and type: adb shell pm uninstall -k --user 0 com.mi.android.globalFileexplorer (replace com.mi.android.globalFileexplorer with the desired application package).
3. Reset the device.

⚠️ Note: Do not remove applications with com.android. or com.miui packages. - this may cause the system to fail.For a full list of safe packets to remove, see the forums XDA Developers or 4PDA.

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Removing pre-installed applications (bloatware) can free up to 1-2 GB of memory, but it requires caution. Always check if the application is critical for MIUI.

7. /data and other system constraints: when only reset remains

If you've tried all the ways, but the memory still shows 100% fullness, the problem might be in the /data partition. In MIUI, this partition is responsible for user data, but sometimes it crashes and the system doesn't calculate the free space correctly.

• 🔄 Updates to firmware by air» (OTA).
• 📱 Custom recovery installations (TWRP).
• 🔧 Incorrect rollback to the previous version MIUI.
• 🛠️ Interrupted flashing.

In such cases, only a full hard reset or flashing through Fastboot helps. However, before you do this, try less radical methods:

1. Checking sections through ADB: adb shell df -h If the section /data show 100% use, but the actual file size is smaller – this confirms the failure.
2. Dalvik cache cleanup: adb shell su -c "rm -rf /data/dalvik-cache/*" (root rights required).
3. Safe Mode Reboot: Press the power button → long tap on Turn off → Safe Mode. If safe mode is normal, the problem is in one of the installed applications.

If nothing helps, reset to factory settings:

1. Back up your data (Settings → Additional settings → Backup and Reset).
2. Go to Settings → About the phone → Reset settings.
3. Select “Delete all data” and confirm.

After the reset, the memory will return to its original state, but all data will be deleted. If the problem recurs, this is an excuse to contact the service center (the flash memory may be defective).

FAQ: Frequent questions about memory on Xiaomi