When Xiaomi suddenly starts writing that memory is not enough, it can take anyone by surprise. At one point, the phone is fast, and after an hour the system blocks the installation of applications or even the reception of photos. This problem is especially relevant for models with a small amount of internal storage, but also occurs on flagships with active use of multimedia. System message about the lack of space is not just a warning, but a signal that the operating system MIUI or HyperOS does not have enough free space for temporary files and correct operation.
Why does this happen? The main reason is the accumulation of cache of applications, residual files after deleted programs and heavy multimedia data. Messengers like WhatsApp and Telegram tend to grow to giant sizes, subtly occupying gigabytes. If your Redmi or Poco smartphone says that memory is not enough, you can not ignore this: overflowing the system partition can lead to freezes, reboots and even the inability to turn on the device.
In this article, we will look at proven methods of freeing up space, from simple settings to advanced cleaning tools. You will learn which folders can be deleted without fear of damaging the system, how to transfer data to a memory card and why standard cleaning tools sometimes do not see “hidden” debris.
Memory Analysis: What Really Takes Place
Before you blindly delete files, you need to understand the structure of storage occupancy. The MIUI shell has a built-in analyzer that shows the distribution of space by category. Go to Settings → Memory to see detailed statistics. Often it turns out that the lion's share is not your personal photos at all, but application data and system cache. Visualization helps you quickly find heavyweights.
Special attention should be paid to the Apps section: Social networks and instant messengers store local copies of all photos and videos viewed. Even if you delete chat correspondence, files can remain in cache, and significant volume is occupied by system logs and error reports that accumulate for months, without deep cleaning they can take up to 10-15 GB of usable space.
There is a myth that only the user partition is overflowing, but on modern smartphones with dynamic division, this affects the entire system. If the system partition is more than 90% full, the phone starts to work slowly. It is important to distinguish between RAM (RAM) and ROM (built-in storage). The message “Not enough memory” usually refers to the built-in storage, not RAM, although confusion in terms is common.
⚠️ Note: Do not attempt to delete files from system folders whose names you do not know, which may cause the interface to fail or data to be lost.
Cleaning cache and garbage with standard means
The safest and first step is to use the built-in Security app, which is Xiaomi's regular tool that effectively deletes temporary files. Open the app, select Cleanup and wait until the scan is over. The system will prompt you to remove the cache, installer residues and advertising debris. Press the cleanup button to make room.
But standard cleaning isn't always enough. For a deeper analysis, use the Deep Cleaning section in the same app.
- 📦 Large files you forgot to delete (video, archives).
- 📸 Duplicate photos that take place twice.
- 📱 APK-Installation files left over after program updates.
- 🗑️ Recently deleted photos that are still in the cart.
Also worth checking is Download. Browsers and instant messengers often save everything you download. Files in this directory can lie for years. Open Explorer → Downloads and sort files by size. Deleting old presentations, documents and pictures can instantly free up a few gigabytes.
☑️ Weekly Memory Prevention
Managing heavy apps: Telegram, WhatsApp, Instagram
Messengers are the main enemies of free memory. Telegram and WhatsApp save all media files in the phone’s memory by default. In Telegram settings, go to Settings → Data and Memory → Memory Use. Here you can see the cache volume and clear it. It is recommended to enable Autodelete by setting a deadline of, for example, 3 days or 1 week. This will automatically delete old files, leaving only text available.
On WhatsApp, the situation is similar, but it's managed through storage. Go to Settings → Data and Storage → Storage Management. You'll see a chat list sorted by space. Often it turns out that group chats with active video sharing take 5-10 GB. You can selectively remove media from specific conversations without deleting the correspondence itself.
Social networks (Instagram, TikTok, Facebook) also accumulate a huge cache. Unlike instant messengers, they rarely have a built-in cache clearing feature without losing login data. The best way is to use Android settings: Settings → Apps → All Apps → [Select App] → Storage → Clear cache. Don't confuse it with Clear Data, otherwise you'll have to re-enter your login and password.
Why can’t the cache be removed completely?
Transfer of data to SD-map and cloud storage
If there is little internal memory, the only way out is to expand storage. Modern Xiaomi supports microSD cards. Once the card is installed in a slot (often combined with a second SIM), the system will suggest using it as portable storage, which is ideal for photos, videos and music.
To automatically transfer photos, set up sync with the cloud. Google Photos or Xiaomi Cloud can automatically upload photos to the Internet and delete them from the device, freeing up space. Enable the “Free space” function in the Google Photo settings. You can also manually transfer DCIM and MIUI folders to the memory card through Explorer by selecting the “Move” option.
| Type of data | Recommended storage location | Advantages |
|---|---|---|
| Photos and videos | SD-map/Cloud | Frees the system partition, safe when reset |
| Documents | The cloud (Google Drive) | Access from any device does not take place |
| Annexes | Built-in memory | It works faster, more stable system |
| Music/Films | SD-map | You can store terabytes of content |
It is important to understand that the application itself is SD-Map in modern versions of Android (Android 10)+) It's very limited or impossible for system applications, and it's done for performance, because memory cards are slower than the embedded flash module.
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Use U3 or V30 memory cards to record 4K video. Cheap cards can slow down your camera and gallery.
Hidden folders and system garbage: where to look more
Even after cleaning, there are files that are not visible in normal viewing, such as folders with names like.thumbnail (galleries miniatures) or tencent (remnants of Chinese versions of applications), which require a file manager with access to hidden files, such as Total Commander or MI File Manager, with the option “Show hidden files” enabled.
The.thumbnail folder can grow to a few gigabytes, it stores previews of all your photos, and if you delete this folder, the system will recreate it, but it will be smaller, which will give you a temporary win, and it's also worth checking the Android/data folder, which stores the caches of games and applications, you can delete the content, but for games it means you have to download resources again.
⚠️ Attention: Folder Android/obb It contains game data, and if you delete it, it will cause the games to stop running and require you to re-upload the data.
Another source of garbage is a folder. MIUI/debug_log. This is where you collect system error reports, and if you're not a developer and you don't send reports to Xiaomi, this folder can be cleaned up. It's often ignored by standard cleaners.
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Regular manual check of folders.thumbnail and debug_log can release 5 GB of space that standard cleaning does not see.
Radical measures: Resetting and formatting
If nothing works and the phone keeps writing that memory isn't enough, the last resort is a complete factory reset, which will put the device back into a store-like state. Before that, make sure to back up all the important data to the cloud or to the computer, as all the data will be destroyed.
The procedure is done through the menu: Settings → About Phone → Settings Reset → Erase all data. Once rebooted, you get a clean system without the accumulated garbage over the years. This often solves not only the memory problem, but also eliminates software errors and brakes.
In some cases, the problem may be hardware, which is the degradation of flash memory, and if the memory fills up on its own in a couple of hours without installing applications, the memory controller may have failed, and only replacing the board or the memory module at the service center will help.