Smartphone Xiaomi Redmi 6A, released in 2018, was once a real hit in the budget segment, offering excellent value for money. However, over time, application requirements increase, and the built-in memory of 16 or 32 GB fills up critically quickly. When the storage is full to capacity, the device begins to slow down, cameras cannot take photos, and the system issues annoying notifications about lack of space.
In this article we will look at not only standard methods for deleting unnecessary files, but also specific shell settings MIUIthat will help restore your device to its former speed. You will learn how to safely remove system junk, transfer data to a memory card, and what hidden developer features can help with optimization. The right approach to storage management will extend the life of your gadget for many months.
Storage usage analysis and built-in tools
Before deleting important photos or documents, you need to understand what exactly is taking up space. The shell MIUI has a powerful built-in tool that is often ignored by users, preferring third-party apps. To begin, go to the menu Settings and find the item Memory or Storage. Here the system will clearly show the distribution of data by category: applications, images, videos, music, etc.
Particular attention should be paid to the “Other” section. Often this is where gigabytes of hidden messenger caches and temporary update files accumulate. A standard analyzer may offer to remove “garbage,” but you should approach this process consciously. Do not rush to agree to delete all proposed files, carefully read the category descriptions.
Use the pre-installed application Security (green icon with a shield). It has a Clean function inside it. Click on the scan button, and the system will offer to remove application cache, advertising files and remnants of uninstalled apps. This is the safest first step and does not require advanced technical knowledge.
⚠️ Attention: When using the Deep Clean function in the Security app, carefully check the list of files before deleting. Sometimes the system marks as garbage important PDF documents or APK installation files that you planned to use later.
Cache management for applications and instant messengers
The most voracious consumers of memory in 2026-2026 are social networks and instant messengers. WhatsApp, Telegram i Viber save each received photo and video to the device’s memory, duplicating them in shared galleries. Over time, folders with media files of these applications can grow up to 5-10 GB, which Redmi 6A is a critical volume.
To solve this problem, it is not necessary to delete the applications themselves. Go to the settings of a specific messenger, find the “Data and storage” section and use the built-in cleaning function. In Telegram, for example, you can configure automatic cache deletion: select item Settings → Data and memory → Memory usage and set the cache retention period, for example, 3 days or 1 week.
For other applications, the path will be as follows: go in Settings → Applications → All applications. Select the desired app from the list, click on the item Memory and then Clear cache. It is important not to confuse this button with the “Clear all” or “Erase data” button, since the second option will delete your correspondence and logins.
- 🗑️ Regularly clear your browser cache Chrome or Mi Browseras they save copies of all visited pages.
- 📸 Disable auto-saving photos from WhatsApp statuses to your phone gallery in the privacy settings messenger.
- 📂 Check the folder
Download(Downloads), where old installers and documents often accumulate.
In the Telegram settings, enable the “Traffic Saving” function for mobile networks - this will also reduce the number of automatically downloaded heavy files into the cache.
Transferring applications and data to a memory card
One of the main features Xiaomi Redmi 6A is the presence of a separate slot for a memory card microSD. This is a salvation for models with 16 GB of internal memory. Android allows you to transfer some application data and all media files to an external drive, freeing up precious internal space for system operation.
The easiest way to transfer photos and videos is to use a file manager. Go to the application Explorer, select the desired folders (for example, DCIM, Pictures, Music) and select the “Move” function. Specify your SD card as destination. The system will automatically create the necessary directories and transfer files.
When transferring the applications themselves, the situation is more complicated. Starting with version Android 8.0 (which is installed on Redmi 6A), developers have limited the ability to completely transfer games and apps to the card. However, in the settings of some applications, the button Change in the memory section may still be active. If it is active, you can move the application body to external media.
☑️ Preparing a memory card for Redmi 6A
If the transfer button is inactive, you can try a trick through the developer menu, but this requires caution. Go to Settings → About phone and quickly click on the item MIUI version seven times until the message “You have become a developer” appears. Then, in the advanced settings, find the “Default applications” item and try changing the installation location, although in new versions of MIUI this function is often hidden.
⚠️ Attention: Do not format the memory card as “Internal memory” (Adoptable Storage) unless you plan to use it only in this phone forever. When formatting, all data on the card will be permanently deleted, and the card itself will be encrypted and cannot be read on other devices or a computer without a full reset.
Removing system garbage and duplicate files
Over time, files that do not belong to any specific file accumulate in the smartphone's memory categories. These could be error logs, temporary update files, thumbnails of deleted photos, and duplicates. The shell MIUI sometimes does not see them during standard cleaning, so manual control or the use of more advanced search algorithms is required.
Pay attention to the folder .thumbnails inside the directory DCIM. Thumbnails of all your photos and videos are stored here. If you have thousands of pictures, this hidden folder can take up several gigabytes. It can be safely cleared, but keep in mind that the next time you open the gallery, the phone will take a long time to generate a preview.
It is also worth checking for duplicates. Often, users accidentally download the same file several times or save photos from instant messengers that are already in the gallery. The built-in Xiaomi Explorer has a duplicate search function that will help identify copies and remove unnecessary ones.
| File type | Where to look (path) | Can I delete? | Risk of data loss |
|---|---|---|---|
| Application cache | Settings → Applications |
Yes | Low (log in again) |
| Thumbnails | DCIM/.thumbnails |
Yes | No (will be created again) |
| System logs | MIUI/debug_log |
Yes | No |
| APK installers | Folder Download |
Yes | No (if the app is installed) |
What if the .thumbnails folder is constantly growing?
If you notice that the thumbnails folder is quickly filling up again, this may indicate media scanner malfunction. Try clearing the Media Server or Gallery app data in the app settings. This will force the system to rebuild the file index from scratch.
Resetting to factory settings as a radical method
If none of the above methods gave a noticeable result, and the phone continues to be unstable due to lack of space, the last resort remains - a complete reset to factory settings (Hard Reset). This procedure will delete absolutely all data from the internal storage, returning the phone to its “out of the box” state.
Before performing this operation, it is critical to back up all contacts, photos and important documents. You can use the cloud service Google Drive or synchronization with your account Mi Cloud. Make sure you remember the password for your Google account, as after resetting the phone will require you to enter it to confirm ownership (FRP protection).
To perform a reset, go to menu Settings → Advanced settings → Recovery and reset. Select item Resetting settings and confirm the action. The phone will reboot and the cleaning process may take 5 to 15 minutes. Do not interrupt this process and do not turn off the device.
⚠️ Attention: After resetting the settings and initially setting up the phone, do not restore all applications from Google backup at once. Install only the essentials manually. Often, it is the restoration of an old backup that returns to the phone the very “garbage” and conflicting settings that led to the need for a reset.
A full reset is not just clearing space, it is an opportunity to start from scratch and eliminate software errors accumulated over years of use.
Prevention and optimization of system operation
To prevent the problem of insufficient memory on Redmi 6A from returning in a month, you need to change your smartphone usage habits. Try not to install heavy games unless you play them regularly. Modern applications are updated, becoming more and more resource-demanding, which is not always compatible with 2018 hardware.
Use “lite” versions of popular applications. For example, Facebook Lite, Instagram Lite or Telegram X take up significantly less space and consume less RAM. For the browser, you can use Via Browser or Opera Mini, which weigh only a few megabytes.
Reboot your phone regularly. This is a simple but effective way to clean up RAM and kill hanging background processes that may not be writing logs correctly to persistent storage. One reboot every 2-3 days is enough to maintain system stability.
- 🚀 Disable auto-updates of applications in the Play Market, leaving only important apps to avoid sudden memory filling.
- ☁️ Set up photo synchronization with Google Photos with the “Free up space” function, which deletes local copies after uploading to cloud.
- 🔍 Once a month, check the “Downloads” folder and the recycle bin in the gallery.
Why does the memory fill up again after cleaning?
The Android system creates new cache and log files during operation - this is normal. However, if the volume grows abruptly without your activity, check your phone for viruses or malicious miners that can use the device's resources.
Frequently asked questions (FAQ)
Is it possible to delete Xiaomi system applications to free up space?
Technically this is possible through ADB commands from the computer, but for This is highly not recommendedfor a regular user. Removing key system components (such as the update service or the system launcher) may cause your phone to stop turning on or to cause constant errors. It is safer to simply disable unnecessary applications in the settings, if such an option is available.
Why does the “Other” section constantly display a large amount of data?
The “Other” category usually includes application cache, system update files, offline map data and temporary files. If the volume of this category is abnormally large (more than 5-6 GB), try clearing the cache of all applications manually or resetting the settings, as this may indicate an error in the file system.
How to transfer WhatsApp to a memory card on Redmi 6A?
You cannot directly transfer the WhatsApp application itself to a memory card in modern versions of Android. However, you can transfer media files (photos, videos, voices). Go to WhatsApp settings → Chats → Chat backup, and configure saving media to the SD card (if the Android version allows) or manually move the folder WhatsApp/Media via Explorer.
Does filling the memory affect the speed of the Internet?
Direct there is no effect on connection speed, but if there is a critical lack of space, the browser cannot save page caches and cookies. This leads to sites taking longer to load, since the phone has to download all the elements anew each time it is accessed, and errors may also occur when loading heavy pages.