Xiaomi Redmi 7A has proven to be a reliable budget device, but over time, even the most optimized system begins to experience a shortage of resources. Users often notice that the interface becomes less responsive and the application launch takes longer than immediately after purchase.
Owners often wonder how to effectively clean the phone without deleting important personal data. Unlike the more expensive models, the budget Snapdragon processors installed in this series are more sensitive to internal memory overflow. If free memory falls below the critical 1 GB mark, the MIUI system can start to work unstable, causing freezes and spontaneous reboots.
In this guide, we will look at proven optimization methods that will help restore the device to its previous speed. We will look at both the standard operating system tools and deeper cleaning methods available through the engineering menu or safe mode. A critical step is to clean the folder.thumbnails, which on the Redmi 7A can take up to 10 GB of hidden space, which often causes sudden save errors.
Use of the built-in "Security" application
The easiest and safest way to start servicing a device is to use a pre-installed system application. Xiaomi has integrated a powerful tool into the MIUI shell that allows you to perform basic diagnostics and cleanup in one click. Launch the Safety app on the home screen and click on the large green Cleanup button.
The system will scan files that are considered temporary or advertising. The cleaning algorithm will automatically detect installer packages, remnants of deleted applications and browser cache. However, it is worth noting that a standard scanner often acts superficially so as not to remove excess, so deep cleaning will require manual control.
⚠️ Note: When using the function "Acceleration" should not rely on it alone, and the release of RAM in this way has a short-term effect, because the system is not the only one that can be used. MIUI It will immediately start the background processes again.
After the initial scan, the system will prompt you to remove the debris found, and it is recommended to carefully review the list before confirming, especially the "Large Files" section, so as not to accidentally delete important documents or photos that the system mistakenly classified as unnecessary.
☑️ Checking before cleaning
For more detailed management, go to the Cleanup section inside the app and select Deep Cleanup, where you can see the file categories that take up the most space. Often, it is the messenger and social media cache that makes up the lion's share of the space that is occupied, and deleting it is safe for accounts to operate.
Manual cleaning of storage through settings
If the automatic tools fail, you need to go to manually analyzing the contents of the drive. In modern versions of MIUI, the path to storage is at Settings → Memory. Here is a visual diagram of the space distribution, allowing you to understand which categories are eating up the resources of your Redmi 7A.
Special attention should be paid to the “Other” section, which often hides system process data, offline maps of navigators and cache of streaming services, and by clicking on this section, you can see a list of applications that store data in this category and, if necessary, clean them individually through the application management menu.
- 📱 Apps: Go to the settings of each heavy application (VK, Telegram, YouTube) and find the item “Storage” to clear its cache, without affecting logins and passwords.
- 📁 Downloads: Check the Download folder where old ones often accumulate APK-installer files and PDF-Documents that are no longer relevant.
- 🗑️ Recycle Bin: Don’t forget to clear the Recycle Bin in the gallery and file manager as deleted files continue to take up space until final erasure.
Use this feature only in extreme cases when the application is not working properly or takes up an abnormally large amount of space due to errors in the database.
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Use Safe Mode to identify applications that hide their files or prevent the system from functioning properly. To log in, press the off button and hold your finger on the "Switch off" item on the screen.
After manual check, it is recommended to restart the device, which will allow the system to recalculate the indexes of the file system and correctly display the new amount of free memory in the interface. If the amount of space released does not match the expected, you may need to analyze the hidden folders in more depth.
Working with garbage folders and cache in the file manager
For advanced users looking to make the most of their Xiaomi Redmi 7A, the standard Explorer will be an indispensable tool. Go to the internal storage root directory and notice the folders with a dot at the beginning of the name — they are hidden by default, but contain a lot of temporary garbage.
One of the heaviest is the.thumbnails folder located in the DCIM/.thumbnails path, which stores thumbnails of all the photos and videos you've viewed, and over time, this directory can be as large as several gigabytes, which is critical for models with 16 or 32 GB of internal memory.
| Folder/Directory | Description of the contents | Recommendation |
|---|---|---|
| MIUI/Gallery/cloud/cache | Cloud gallery cache | Can be removed |
| Tencent/MicroMsg | Cash and WeChat media files | Clean carefully |
| Android/data | Application and game data | Just the cache. |
| .cache | System time cache | Safe to remove |
Another area that is often overlooked is the Android/data folder, which contains the directories of installed applications, and you don't have to delete the entire application folder because it will reset the settings, but you can find cache or temp folders inside that are cleaned regularly without affecting the software.
What if the.thumbnails folder appears again?
When working with a file system, be extremely careful about file extensions. Deleting files with the.db or.xml extension from the system folders can cause interface malfunctions. Always focus on the folder size and name associated with a particular application.
Cleaning messengers: Telegram, WhatsApp, Viber
Messengers are the main memory consumers on any modern smartphone, and the Redmi 7A is no exception: these apps store every image, video and voice message viewed in the memory of the device. Without regular cleaning, they can take up to 50% of all available space.
Telegram handles the situation the most flexibly. Go to Settings → Data and memory → Memory usage. Here you can see the total size of the cache and clear it with a single button. Moreover, in the section “Autoboot Media”, it is recommended to disable the storage of heavy files when using mobile data to prevent memory clogging in the future.
⚠️ Note: WhatsApp does not have a built-in “Clear Cache” feature without deleting correspondence. To clean, you need to use a file manager and delete the contents of the folder. WhatsApp/Media/.Statuses (statuses) and video files in the folder WhatsApp/Media/WhatsApp Video.
Viber also tends to accumulate data. In the app settings, look for the Memory and Data section, where you can select to clear the cache, and set a period for automatic deletion of media files, and set a limit of 3 or 7 days so that old files are deleted automatically.
- 📹 Video files: Take up the most space. Check the Images and Video folders inside the messenger folders first.
- 🗣️ Voice messages: Often saved in formats that are not compressed, taking up a lot of space with a long history of correspondence.
- 📄 Documents: Files transferred in chat rooms (PDF, DOCX), They are not compressed and remain in memory forever unless they are manually removed.
Once the messengers are cleaned, it is recommended to restart them so that they update the messaging database.This can take some time, especially if the correspondence history is very large, but this will ensure that the chat list is correctly displayed.
Removing hidden system files and residues
Even after an application is removed, it may still have its tails — empty folders, configuration files, and error logs — that can be searched by sorting files by the date of the change in the file manager. Files that have the same date as the date of removal of the applications are often residual.
Of particular interest is the folder MIUI/debug_log. It stores the system debugging logs, which can be turned on by default when applications fail. If you're not a developer or debugging a system, you can delete the contents of this folder, freeing up hundreds of megabytes.
It's also worth checking for.apk files in all corners of memory. Often users download app installers, install them, but forget to delete the installation file itself. Searching for.apk in Explorer will help quickly find and remove these unnecessary distributions.
And remember, the Bluetooth folder, if you've ever sent files through this interface, and you can have old videos or music that were taken years ago and forgotten, and it's safe to delete them and it won't affect the communication module.
Resetting to factory settings as a radical method
If none of the above methods have worked and the phone continues to run slowly, the last and most effective way is a complete factory reset, which will put the Xiaomi Redmi 7A back out of the box, removing all user data, settings and apps.
Before starting the procedure, it is critical to back up all important data, use Google’s cloud services or the built-in Mi Cloud to save contacts, photos and notes, and it is also recommended to transfer all media files to a computer or microSD card, since the internal memory will be fully formatted.
To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The system will request confirmation of the screen unlock password and Mi Account. Once confirmed, a process that can take 5 to 15 minutes will begin.
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Full reset is the only way to ensure that hidden system errors and viruses cannot be eliminated by standard cleaning methods are removed.
⚠️ Warning: Make sure the battery is charged at least 50-60% Interrupting the formatting process due to battery discharge can damage the system partition and prevent the phone from turning on.
Once you reboot, you'll see the screen of the initial setup, like when you first turn on a new phone. Don't rush to restore all the apps right from the backup. Install only the essentials and watch the system work. Often, it turns out that the brakes were caused by one particular conflicting application that you just won't install again.