Why Xiaomi doesn’t have room in its phone – and how to fix it

Why Xiaomi is running out of memory so quickly?

You've just installed a new app or taken a few photos, and the phone says, "Not enough memory." Known? Xiaomi, Redmi and POCO smartphone owners are more likely to experience this problem than others -- and it's not always a small storage capacity. Even on models with 128 GB or 256 GB, memory can literally disappear in front of our eyes.

It’s not just user files that are to blame. MIUI actively reserves cache, updates and service data, while not always properly clearing up junk after deleting apps. In addition, many features (such as dubbing photos into the cloud or automatically recording conversations) run in the background, stealthily eating gigabytes. In this article, we’ll look at 8 real reasons why there’s no space in a Xiaomi phone, and give step-by-step instructions for freeing memory from basic methods to hidden MIUI settings.

1. Apps and Systems Cache: The Invisible Memory Eater

Cache is a temporary file that creates applications and the system itself to speed up work, which in theory should be automatically cleared, but in practice in MIUI, this mechanism often fails, for example, the cache of Google Play Services or Mi Video can take up to 5-10 GB, even if you have not used these services in a long time.

How to check:

• 📱 Go to Settings. → Annexes → Application management.
• 🔍 Sort the list by size (click on the three dots in the upper right corner).
• 🗑️ Surprisingly, even standard apps like Galery or Music can have cache in the app. 1-3 GB.

⚠️ Warning: Do not clear the cache for system applications like Miui System or Android System, this can cause malfunctions in the phone).

2.Duplicate files: why photos and videos take up twice as much space

One of the most insidious features of MIUI is the automatic duplication of media files.

• 📸 Originals and compressed copies of photos (Double saving in camera settings).
• 🎥 Video in two resolutions (e.g., video, 4K + Full HD save space).
• 📁 Cloud Copies (if synced with Mi Cloud or Google Photos is enabled).

How to find duplicates:

1. Open the Galery app (Gallery).
2. Press three points. → Management → Duplicate.
3. The system will show all duplicate files. Delete unnecessary copies (leave the highest-resolution originals).

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Before removing duplicates, check if Automatic Backup is enabled in Mi Cloud, otherwise you may lose a single copy of the file.

3. System Updates and MIUI Reserve Space

Xiaomi reserves up to 5-7 GB of memory for system updates — even if you haven’t updated in a long time. These files are not displayed in the standard file manager and are not deleted through settings. Moreover, after installing the update, old packets often remain in memory as “junk”.

How to make room:

1. Go to Settings → About the phone → System update.
2. Press three points. → Remove downloaded packages.
3. If the button is inactive, then there are no updates. Then use Memory Cleanup in Settings → Memory.

⚠️ Attention: If you are using MIUI 13/14 phone-wise 64 GB of memory, reserve for updates can take up to 10% That's fine, but if a critical location is needed, turn off automatic update downloads in the settings.

4. Eater apps: which programs eat memory unnoticed

Some apps can take up several gigabytes, even if you don't use them.

• 🎮 Games (Genshin Impact, PUBG Mobile, Call of Duty - before 4-8 GB).
• 📺 Streaming services (TikTok, YouTube, Kwai – caching video in the background).
• 🗺️ Maps (Google Maps, Yandex.Maps – download offline maps and location data).
• 📱 Social networks (Facebook, Instagram – store a cache of stories and videos).

How to reduce their appetite:

Remove unused games|Clear the cache in Settings → Annexes|Turn off autoload video in social network settings|Remove offline maps in Google Maps-->

🔹 Hidden advice: In MIUI There's a Deep Clean feature that removes unnecessary application files. → Memory. → Cleaning (broom sign in upper right corner).

5.Multimedia: Why music and video take up more than it seems

Media files are the main culprits of memory loss, but the problem is not just how many they are, but how they are stored.

• 🎵 Music in high quality (e.g., music, FLAC 320 kbps MP3) It can take up to 10 MB per track.
• 🎬 Video in the video 4K — up to 400 MB per minute (even a short video) = gigabytes).
• 📸 Photo in RAW — before 20-30 MB for the photo (instead of the usual) 3-5 MB in JPEG).

How to save space:

1. In the camera settings (Settings → Camera → Photo/Video resolution), choose Full HD over 4K unless you need maximum detail.
2. Use photo compression in Google Photos (settings → Quality of saving → High).
3. Transfer the music to the cloud (Yandex.Music, Spotify) or to a memory card.

6. Hidden files and folders: what takes up space, but not visible to the user

MIUI has a lot of hidden files that don’t appear in the standard manager, but take up space:

• 📂.thumbnails folder – photo and video thumbnails (can weigh up to a maximum of two) 1-2 GB).
• 📂 folder.MIUI — time-file.
• 📂 folder Android/obb — Game and application data (sometimes left behind after deleting programs).
• 📂 folder MIUI/Camera — backups of photos and videos.

How to find and remove them:

1. Install a file manager with hidden file support (such as Solid Explorer or FX File Explorer).
2. Turn on the display of hidden folders in the manager settings.
3. Delete the contents of the.thumbnails,.MIUI/backup and Android/obb folders (if the games have already been removed).

⚠️ Attention: Do not delete folders MIUI/system or Android/data — This can cause a system failure, and don't touch files with the.db extension).

7.Memory card: why it doesn't help free internal memory

Many Xiaomi users buy a memory card, but they are faced with the fact that the internal memory is still running out.

• 📱 Most applications cannot be moved to SD-map (especially system and games).
• 📁 Photos and videos are stored in internal memory by default (you need to change manually).
• 🔄 MIUI caches data on the internal drive, even if the files on the card.

How to make the memory card work:

1. In camera settings (Settings) → Camera. → Select the place of preservation SD-map.
2. Move possible applications to the map: Settings → Apps → [select app] → Storage → Change.
3. Use the card as internal memory (formatting as Adoptable Storage), but remember: once the card is removed, the applications will stop working.

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A1/A2 memory cards (such as the SanDisk Extreme) are faster and longer lasting in smartphones than the cheap Class 10.

8 Viruses and malware: When memory “disappears” on its own

If the memory is running out for no apparent reason (you haven't installed anything, you haven't downloaded anything, but the space is running out), you may have a virus attack.

• 🕵️ Masqueraded as system files and download advertising in the background.
• 📥 Loading unnecessary APK-files in the Download folder or MIUI/Download.
• 📊 Create hidden folders with garbage (for example,.adcache or.temp).

How to check and clean:

1. Install an antivirus (Malwarebytes or Dr.Web Light) and scan your phone.
2. Check the Download folder for suspicious files (e.g, update.apk, flash_player.apk).
3. In Settings → Accounts → Google → Security Enable Checking Play Protect Apps

⚠️ Warning: If you notice that your memory is diminishing at night or when you connect to Wi-Fi, this is a sure sign of a virus.

FAQ: Frequent questions about memory in Xiaomi