Why Xiaomi has little memory: systemic reasons and solutions

Have you noticed that your Xiaomi or Redmi suddenly ran out of memory when you didn't install new apps? Or that the system upgrades reduced space by a few gigabytes? This problem is familiar to many smartphone owners of the brand — and it has specific reasons related to the features of MIUI firmware and device architecture. Unlike naked Android, where memory is consumed predictably, hidden system processes, app cache and even marketing moves of the manufacturer play a role here.

In this article, we will not just list the standard tips like “clean up the cache” (though they are important), but will explore the deep reasons why memory runs out faster on Xiaomi than on other smartphones. You will learn how to check the real memory allocation (not what the system shows), which files can be safely deleted and which should not be touched. We will also analyze why even after resetting to factory settings, memory does not fully recover – and what to do about it.

MIUI System Partition: Why It Eats User Memory

The main reason for the memory shortage on Xiaomi is the MIUI firmware architecture. Unlike standard Android, where system files and user data are rigidly separated, it uses dynamic memory allocation, which means that part of the internal drive is reserved for the needs of the system - and the user can not control it directly.

For example, on smartphones with 64GB of memory, there are actually about 50-55GB (and sometimes less!) of storage available to the user.

• 📁 Section /system — It stores firmware files, kernels and preinstalled applications. MIUI 14/15 he can borrow up to 8-12 GB.
• 🔄 Section /vendor — drivers and proprietary libraries for iron (cameras, communication modules, etc.) 1-3 GB.
• 🛡️ Section /recovery — backup to restore the system. 500 MB — 1 GB, but after the updates may grow.
• 📊 Section /misc And other service ones, they store logs, settings, and temporary data. 1-2 GB.

But the most unpleasant part is the /data partition, which theoretically belongs to the user, but in practice part of it is occupied by hidden MIUI files. For example, after updating the system, old firmware versions remain in this section (sometimes 2-3 GB for each update!).

⚠️ Note: If you see in the settings that the "System" takes 15-20 GB, it's not always a mistake. Part of that is a reserve for future updates. 25 GB, it is worth checking the device for viruses or file system failures.

2. App cache and junk files: why they are not automatically cleaned

The second most important reason is uncontrolled cache growth, and in MIUI caching is more aggressive than in standard Android: the system saves temporary files not only to speed up the application, but also for analytics (yes, Xiaomi collects usage data).

• 📱 Google Play Services Cash and MIUI The system can reach 1-2 GB for a few months.
• 🎵 Music and video apps (like YouTube or TikTok) store preloaded media even if you haven’t downloaded it.
• 🗑️.thumbnails (image and video miniatures) are hundreds of megabytes long and are never automatically cleared.
• 📦 Residual files of remote applications (/data/app-lib) They can hang for years.

Compounding the problem, the built-in cleaning utility in MIUI often works inefficiently, it only removes surface debris, leaving deep caches and system logs. For example, after cleaning through the Settings → Memory menu, you can see that there is only 200-300 MB of free space added, even though there was actually 1-1.5 GB more garbage.

Another hidden memory eater is the system's logs and dumps, and if your smartphone ever overheated, fell, or got stuck, the system could create reports (/data/tombstones or /data/anr), one of which can weigh 50-100 MB, and dozens of them accumulate.

3. Pre-installed applications: can they be removed without root

Xiaomi is famous for its abundance of pre-installed software, from useful utilities like Mi Remote to services that most users don't need (Mi Pay, Mi Video, GetApps).

• 🔒 You cannot remove the standard means (only disable).
• 📥 Update through Google Play, increasing your weight.
• 🔄 Work in the background, creating cache and logs.

For example, the Mi Browser can take up to 300MB (including cache and data) even after it is turned off, while Mi Video downloads trailers and movie covers in the background.

To remove pre-installed apps without root rights, you can use ADB (Android Debug Bridge). For example, to remove GetApps, run the command:

adb shell pm uninstall --user 0 com.xiaomi.mipicks

⚠️ Attention: Removing system applications may cause firmware to malfunction. Before executing commands, back up your data and make sure the application is not critical to the system (e.g., Mi Security is not recommended to be deleted).

4 MIUI updates: why they take up so much space

Each MIUI update is not just a security patch, but a full firmware weighing 1.5-3 GB. At the same time, the system saves the old versions "just in case", which leads to the following:

• 📦 After updating in the folder /data/ota_package The archive is still with the firmware (for example, miui_HMNote11Pro_23.4.12.zip).
• 🔄 The system backs up current settings before updating (/data/backup).
• 🗑️ In a file. /cache Temporary installer files are accumulated.

After 3-4 updates, these files can take up to 10 GB of storage — and the system doesn't automatically delete them.

1. Go to the Files. → Internal memory. → ota_package and remove everything ZIP-archive.
2. Clear /cache through the file manager (root rights or access via ADB will be required).
3. Use the command to clean up the update cache: adb shell pm clear com.android.updater

Remove archives from /ota_package|Clear the update cache through ADB|Check the folder. /cache for the presence of temporary files|Reset the device-->

If you're not planning to roll back on the old firmware, you can delete those files. They don't affect the current system.

5. Hidden MIUI functions that occupy memory

MIUI contains many hidden features that users don't even know about, some of which are actively consuming memory:

• 🎥 Continuous Screen Recording: If Screen Recording in the Background option is enabled (in Settings) → Special features, video saved in /Movies/ScreenRecords and can weigh 500 MB for 5 minutes.
• 📸 Automatic backup: MIUI Creates backups of applications and settings in /MIUI/backup/AllBackup. One backup can take up to 1 GB.
• 🔍 File indexing: For quick search, the system creates a database (/data/user/0/com.miui.search/index), which grows with time to 200-300 MB.
• 🎵 Music preload: If you’ve ever used Mi Music, the app could download songs in the background (folder) /MIUI/Music).

To disable unnecessary functions:

1. Screen recording: Settings → Special. features → Screen recording → Disable.
2. Autoback: Settings → About Phone → Backup → Disable Automatic Backup.
3. Indexing: Settings → Applications → Application Management → Search → Clear data.

6. How to Really Free Memory: Step-by-step Instruction

If the standard methods do not help, use this algorithm:

1. Check the actual memory allocation through Settings → Memory → Details. Pay attention to System, Applications and Media Files.
2. Delete heavy files: 🎬 High-resolution video (folders) DCIM/Camera Movies). 🎵 Unused Podcasts or Music (Music folder). 📁 Archives and APK-files (Download folder).
3. Clear the cache of all apps through Settings → Apps → Select App → Memory → Clear the cache. Start with Google Play Services, MIUI System and social media.
4. Remove old updates (see section 4).
5. Move the applications to SD-map (if supported) for this: Settings → Annexes → Select an application → Memory. → Change. → SD-map ⚠️ Note: Not all applications support portability (MIUI Security, Settings cannot be moved.
6. Use cloud storage for photos and videos. Enable automatic upload to Google Photos or Mi Cloud, and then delete local copies.
7. Reset to factory settings (last resort) before you save important data!

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If the memory runs out again quickly after cleaning, check the phone for viruses using Malwarebytes or Dr.Web Light. Some Trojans create hidden files in the /data/local/tmp folder that take up gigabytes.

7. Alternative solutions: from root to firmware change

If all of the above methods have not worked, consider drastic measures:

• 🔧 Getting root rights: allows you to delete system applications, clear hidden folders and reassign memory partitions, minus the loss of warranty and the risk of “bricking” the device.
• 📱 Install custom firmware (like LineageOS or Pixel Experience) that has no pre-installed debris and is more efficient in memory consumption, but requires unlocking the bootloader.
• 🔄 Using an external drive: some Xiaomi models (e.g, POCO X3 Pro) support adoptable storage, a function in which SD-This is formatted as internal memory, and this allows you to expand the storage space.
• ☁️ Switch to cloud services: upload all media files to Google Drive or Yandex Disk and leave only the essentials on your phone.

Before using these methods, assess the risks:

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If your smartphone is older than 2-3 years, the most effective solution may be to buy a new device with more memory. Modern applications and updates to MIUI require more space, and the fight for each gigabyte becomes meaningless.

FAQ: Frequent questions about memory on Xiaomi