Xiaomi and Redmi users often face the paradox of having a few gigabytes of free storage on their device, but the system claims that there is not enough memory to install updates or run applications, a mistake that is not due to a lack of total internal storage, but due to fragmentation of the system partition or overflow of reserved areas where temporary files are written. Owners of budget models with 32 or 64 GB of memory notice this problem more often, since the system partition size is tighter.
Ignoring this warning can cause the phone to slow down, stop downloading new messages in messengers or even freeze when trying to take a picture. MIUI, the shell from Xiaomi, has its own features of disk space allocation that differ from pure Android. Understanding the structure of folders and the ability to properly clean the system cache is the key to solving the problem without losing personal data.
In this guide, we will not only look at standard cleaning methods, but also at hidden debugging functions, as well as manually managing files through ADB if the GUI is no longer responsive. It is important to act consistently so that you do not accidentally delete the system files needed to run the operating system.
Diagnostics: Why memory is busy when files are deleted
The first step should always be accurate diagnosis. Often users delete photos and videos, but forget that the bulk of the space is occupied by cached data messengers and remnants of remote applications. Unlike other brands, Xiaomi stores error logs and usage reports in hidden directories that are not visible when you normally view through the gallery.
The system partition, where temporary update files are stored, can be overflowing with “battered” downloads. If you tried to update your phone before and the process was interrupted, the residual files could block the possibility of a new record, and it is also worth checking the Download and Bluetooth folder, which often automatically save heavy files without the owner’s knowledge.
⚠️ Note: Do not try to delete files in the root directory whose names you do not know, especially if they have extensions.apk,.xml or are in folders with the system prefix.
To get a good idea of the situation, use the built-in analyzer. Go to Settings → Memory and carefully study the distribution chart. If the Other category takes up a disproportionate amount of space (more than 10-15 GB), then the system has accumulated digital garbage or an application cache that is not deleted by standard methods.
Basic cleaning through standard MIUI tools
The MIUI shell features a powerful built-in Security tool that is often more efficient than third-party counterparts, and can find duplicate files, remnants of deleted programs, and large files you may have forgotten. Launch the Security → Cleanup app and wait for the scan to be completed.
Pay special attention to the Big Files section, which often hides forgotten videos from messengers or offline maps of navigators, removing unnecessary files from this list is the fastest way to free up a few gigabytes, and it is worth checking the Applications section, where you can see how much space the cache of each installed software takes up.
- 📱 Open Security and select Cleanup to delete temporary files.
- 🗑️ Go to Deep Cleanup to find duplicate photos and forgotten installers APK.
- 📂 Manually check WhatsApp and Telegram folders through the file manager, removing folders with media.
- ⚙️ In the application settings, find heavy programs and click “Clear Cache” (not “Clear Everything” so as not to lose logins).
If the standard cleaning didn’t work, try clearing the Downloads system application data. Go to Settings → Apps → All Apps → Downloads → Memory → Clean. This action is safe and will only delete the downloaded files list, but not the files in the memory themselves.
☑️ Checklist for quick cleaning
Work with garbage in messengers and social networks
The main memory eaters on Xiaomi Redmi smartphones are Telegram, WhatsApp and Viber. These apps store every picture, video and voice message viewed into the device’s memory, creating giant archives. In Telegram, for example, the default settings allow you to cache an unlimited number of media files.
To fix this, you need to go to the settings of each messenger. In Telegram, the path looks like Settings → Data and memory → Memory Use → Clear the cache. There you can also turn on autodelete the cache, for example, in 3 days or a week, this will prevent re-overflow in the future.
WhatsApp is more complicated because it stores media files in a shared file system. It is recommended to use a built-in storage management tool: Settings → Data and Storage → Storage Management. Here you can sort chats by volume and remove attachments only from the heaviest dialogs without touching correspondence.
⚠️ Before mass cleaning of messengers, make sure that important documents and photos are saved in the cloud or on your computer. After cleaning the cache, it will be impossible to restore deleted media files without a backup.
It’s also worth turning off auto-save to the gallery for all messengers, which won’t reduce the current volume, but will prevent the creation of duplicate images that are already stored in the application database, but are also copied to the main gallery of the phone.
Cleaning the system partition and hidden folders
If the space disappears "on its own," most likely, system logs or folders with error reports have grown. MIUI/debug_log, It can grow to a few gigabytes, and you'll need a file manager with permission to access your system folders or a PC connection to access it.
Another source of problems is the Tombstones folder, which stores app crash reports. If your phone is stable, you can delete those files. Also check the.thumbnails folder in the hidden DCIM directories, which store thumbnails of your photos, which sometimes take up more space than the originals.
For advanced users, debugging mode is available to see the real world of space. Enable developer mode by clicking 7 times on the build number in About Phone. Then, in the developer menu, find “Run Services in the Background” or use commands through ADB for analysis.
adb shell dumpsys meminfoThis command will output a detailed report on which processes and services consume the most RAM and persistent memory.Look for processes labeled System or Media that may have memory leaks.
How to delete the folder.thumbnails safely?
Use of memory card and cloud services
If internal memory is physically scarce, the smartest solution is to expand storage. Most Redmi models support microSD cards. It is important to set up the phone properly so that new photos and videos are stored immediately on the card, bypassing internal memory.
In modern versions of Android and MIUI You can't just move the app to the map, but you can change the default save path for the camera and voice recorder. Go to the camera settings and select Save to the SD-This will instantly free up gigabytes of space.
The alternative is cloud storage: Google Photos or Xiaomi Cloud allows you to store original photos online, leaving only compressed copies on your phone or completely deleting them locally. Google Photos’ “Free space” feature automatically removes from your device those pictures that have already been uploaded to the cloud.
| Method | Efficiency | Risk of data loss | Difficulty |
|---|---|---|---|
| Standard cleaning | Low. | No. | Minimum |
| Cleaning up messengers | Tall. | Medium. | Low. |
| Transfer to SD-map | Medium | No. | Low. |
| Reset to factory settings | Maximum | High-pitched | Tall. |
💡
Use UHS-I U3 or higher memory cards, and cheap cards can slow down your phone and cause errors when recording video in 4K.
Radical measures: resetting and reflashing
When the software methods are exhausted and the “lack of memory” error keeps appearing, the last option is a complete reset, which will return the phone to the “out of the box” state by removing all user data, applications and settings.
Reset via the recovery menu. Turn off the phone, then press the power and volume button (depending on the model) before the Mi logo appears. Select a language and press Wipe Data → Wipe All Data. The process will take a few minutes.
If even after the reset, the problem persists, it may be the memory partition itself or the file system that is damaged, in which case only flashing the device through the computer using the Mi Flash Tool utility will help, a complex procedure that requires an unlocked bootloader and driver skills.
⚠️ Warning: Flashing and unlocking the bootloader will void the warranty and may result in complete data loss.Do this only if you are confident in your abilities and the availability of original firmware for your particular model.
Once you have a clean system installed, take your time to restore all the applications at once, install them one by one, and monitor memory behavior, which will help identify the culprit application that caused the overflow before.
💡
Regularly restarting your phone (at least once a week) helps the system correctly complete background processes and clear temporary files, preventing the accumulation of memory errors.
Preventing memory overflow in the future
To prevent the problem of “insufficient memory” on Xiaomi Redmi from returning, you need to develop a habit of controlling the storage. SSD-The storage device inside the phone should always be free at least 10-15% volume.
Remove rarely used apps or use their lightweight web versions. Many social networks have lightweight versions (Lite), which take up significantly less space and consume less resources. Also regularly check the Downloads folder, where garbage often accumulates.
Use desktop cleaning widgets to quickly access space-free functions. Visual control helps you respond more quickly to a decrease in free space without causing a critical system error.