Modern smartphones Xiaomi, Redmi and Poco are equipped with huge data sets: 4K-video, RAW-Photos and heavy apps quickly fill up even 256 GB. Users often encounter a critical message "Memory is full" that blocks the installation of updates and normal operation of the system. MIUI Ignoring this problem leads to a significant decrease in the speed of the interface and the possible loss of important data.
In this article, we will discuss not only standard trash cleaning, but also deep-seated file system optimization techniques. You will learn how to safely remove system debris, transfer data to the cloud and use external drives without losing warranty. Freeing /data on Xiaomi is possible without Root rights, if you use the correct algorithm of actions described below. Let's turn your smartphone into a fast tool, not a repository of forgotten files.
Analysis of the occupied space and search for hidden eaters
Before you delete files at random, you need to conduct a detailed diagnosis of storage. Standard Android tools often show only the big picture, hiding the real volumes occupied by the cache of messengers and residual files of remote programs. Xiaomi owners are more fortunate than users of other brands, thanks to the built-in tool “Conductor”, which knows how to visualize disk employment.
Go to Explorer → Folder → Internal shared storage. Here you will see a pie chart with color categories: Apps, Images, Video. Click on any sector, the system will suggest removing the unnecessary, but for professional cleaning, you should use the developer menu or third-party utilities like DiskUsage, which show the folder structure as a.tree map.
- 📂 folder MIUI/Gallery/cloud — It often stores thumbnails of deleted photos that take gigabytes.
- 💬 Directory Android/data — The main cache storage of games and instant messengers, which is rarely cleaned automatically.
- 🗑️ System Recycle Bin - Deleted files lie here for 30 days, continuing to take up space.
Pay special attention to the Android/media/com.whatsapp folder or similar ones for Telegram and Viber. These apps save all the media files you viewed in public. If you are in dozens of channels, the amount of such “garbage” can reach 20-30 GB. Regularly checking these directories is the first step to freeing up space.
⚠️ Note: When manually cleaning folders Android/data Do not delete files with the.obb extension for games you continue to play, and deleting them will cause you to download gigabytes of data again when you launch the application.
Cleaning up system debris and app cache
HyperOS and MIUI have a built-in mechanism for storing temporary files, which is necessary for fast loading of frequently used applications, but over time the balance shifts towards clutter. Standard cleaning through Security is often superficial. For deep cleaning, you need to go to the settings of each heavy application separately.
The navigation looks like this: Settings → Apps → All apps. Choose a voracious app (like YouTube or TikTok) and click Memory. There are two buttons available: Clear (removes only the cache) and Erase Data (resets the app to factory status). Use the first option regularly, the second option only if the application is not working properly.
☑️ Deep cache cleanup
There is also a hidden partition of the system cache that is not visible in the regular menu. To access it, you can use Recovery mode, but this requires a reboot. ADB-When you connect the phone, you execute the command:
adb shell pm trim-caches 999999999This command compulsorily clears the cache of all applications, making room where the average user cannot reach with his hands, but after this procedure, applications can open a little slower the first time, as they will re-cache.
- 🚀 Automation: Configure automatic cleaning in the Security app when you reach the filling threshold 90%.
- 📉 Limits: in some launcher settings, you can limit the size of the cache for specific programs.
- 🔄 Reboot: A regular phone reboot once a week also resets some temporary system files.
Working with messengers: Telegram, WhatsApp and Viber
Messengers are the main enemies of free memory on modern Xiaomi smartphones. Unlike iOS, where the cache is cleaned relatively carefully, in Android versions of these applications files are duplicated and scattered in different directories. Telegram, for example, by default saves all the photos and videos viewed in the gallery, taking up space twice: in the app cache and in the system folder of images.
To solve the problem in Telegram, go to Settings → Data and Memory → Memory Use. You need to set a cache size limit (for example, 512 MB or 1 GB) and, most importantly, set up auto-delete. Enable the function “Save media” and select the period “3 days” or “1 week.” After that, click “Clear Telegram cache.” Don’t worry, your correspondence and files will remain in the messenger cloud and re-upload if necessary.
WhatsApp is more complicated because of encryption and file structure. Go to Settings → Data and Storage → Storage Management. The system will show files larger than 5 MB and chat rooms that take up the most space. You can selectively delete videos from specific dialogues without losing text history of correspondence.
The secret to cleaning WhatsApp
⚠️ Warning: Clear All in Messenger Storage Settings can delete important documents if they haven't been saved to the cloud separately. Always check the content before mass deletion.
Cloud storage and synchronization
If the phone’s physical memory is limited, it makes sense to move archived data to the cloud. Xiaomi Cloud offers basic 5 GB for free, but for full-time work it’s better to consider subscriptions or alternatives like Google One, Yandex.Disk or Dropbox. Integration with Google Photos allows you to store original photos in a compressed (“Economic”) format for free (taking into account the current Google policy) or in original quality, taking up an account quota.
Turn on the Free Space feature in the Google Photos app, which automatically removes photos and videos that have already been successfully uploaded to the cloud and backed up, and it’s a safe way to delete thousands of photos at a single click, leaving them available for viewing over the Internet.
For Mi Cloud users, you can sync your gallery, contacts, notes and voice recorder. Activating gallery sync allows you to store full versions of your photos in the cloud, leaving only thumbnails on your phone. When you view the photo, it loads in full quality, but it doesn't take up space permanently until you open it.
- ☁️ Google One: Gives 15GB free by combining Mail, Drive and Photo storage.
- 📸 Mi Cloud: Deeply integrated into the system, allows you to hide albums on the device, leaving them in the cloud.
- 📂 Yandex.Disk: often offers unlimited photo storage for tariff users Plus, which is beneficial for archiving.
Expanding memory with microSD and OTG cards
Many Redmi and Xiaomi budget models retain a microSD card slot. This is a physical way to add memory. However, in modern versions of Android, the work with memory cards has changed: the system does not recommend using them as an extension of internal memory (adoptable storage), preferring to store only multimedia.
To install the card, go to Settings → Storage. The system will suggest formatting the map. Select "Use as a portable storage." Then, in the camera and voice recorder settings, you can choose to save new files immediately to the map. Old files will have to be transferred manually through Explorer.
An alternative for flagships without a card slot (such as Xiaomi 14 or Poco F6) is to use USB-OTG flash drives. By connecting the drive through the Type-C adapter, you can instantly transfer heavy video files to it or make a backup of the system. This does not add memory to the system to install applications, but solves the problem of lack of space for files.
💡
Use UHS-I or UHS-II (U3) speed memory cards. Cheap Class 10 cards can slow down your smartphone, cause lags when shooting 4K video, and even cause the interface to freeze.
Table: Comparison of memory cleaning methods
So to give you the best strategy, let's compare the basics of efficiency and safety, and some of them give you instant but temporary results, and others take time, but make room for the rest of the time.
| Method | Efficiency | Security | Difficulty |
|---|---|---|---|
| Standard cleaning ("Safety") | Low (up to 1 GB) | Tall. | Low. |
| Clearing messenger cache | High (5-30GB) | Medium (you need to know what to remove) | Medium |
| Moving to the cloud | Maximum | High (if there is internet) | Low. |
| ADB teams (trim-caches) | Medium (2-5 GB) | Medium (requires PC) | Tall. |
| Reset to factory settings | Complete. | Low (Data Loss Risk) | Tall. |
As you can see from the table, the most effective and safe way for the average user is to combine cleaning the messenger cache and transferring media files to the cloud. ADB-Teams are justified for advanced users who want to squeeze the maximum without losing personal data.
Radical measures: Resetting and reflashing
If nothing helps and the phone writes “Not enough memory” even if there is 10 GB of free space, it may be that the file system is damaged or that partitions are reserved for system errors, in which case a full reset helps.
Before the procedure, make sure to make a full backup via Settings → About Phone → Reserve and Restore. Save backup to your computer or the cloud. Then go to Recovery Mode (clamping Volume + and Power when your phone is off) and select Wipe Data.
Once reset, the phone will be like new. Don't restore all apps from Google backup, you'd better just put them in. Often, the old settings and tails of remote programs take up more space than the apps themselves.
⚠️ Note: Full reset deletes ALL data, including photos, contacts and correspondence, if they are not synced with your Mi or Google account. Make sure the sync is successful (last sync time status should be up to date).