Budget smartphone owners often face the challenge of lacking internal space, and the Redmi 9A is no exception: the limited amount of built-in storage is quickly filled with system files, app updates and user content, leading to a slowdown in the interface.
When the storage is full, the MIUI operating system starts to work unstable, and new photos or messages can simply stop being saved. You do not need to immediately look for ways to replace the device, since competent optimization can return the device to its former friction.
In this guide, we’ll look at proven methods for freeing up space, ranging from standard system tools to manually removing hidden junk files. Understanding folder structure and knowing the hidden features of the shell will allow you to free up several gigabytes of free space.
Diagnostics and analysis of occupied space
Before you take drastic action to remove data, you need to determine exactly what consumes the lion’s share of your gadget’s resources. Standard diagnostic tools provide a detailed picture of the distribution of files by category.
To get started, open the Settings menu and find the About Phone section. This shows the basic information, but for a deeper analysis, you'd better go to Warehouse or use the built-in Security app.
The system automatically scans the drive and distributes the data into groups: applications, images, videos, documents, etc. Often it turns out that the bulk of the work is not the programs themselves, but their cache and downloaded media files from messengers.
- 📱 Apps and games often weigh more after installation due to cache and data.
- 📸 Gallery can inflate due to serial shooting and preserved statuses.
- 💬 Messengers (WhatsApp, Telegram) accumulate gigabytes of media files.
- 🗑️ Gallery Recycle Bin Retains Deleted Photos for up to 30 Days.
⚠️ Warning: Before deleting system files or folders with an unknown name, be sure to check their contents so as not to disrupt the operation of the operating system.
Special attention should be paid to the MIUI and Android folder at the root of internal memory, which stores error logs, temporary update files and remnants of remote programs that can be safely eliminated.
Use the built-in analyzer to see the top-5 And often on this list are social networks that store hundreds of megabytes of images and videos you've viewed in cache.
Cleaning with the built-in Security application
The easiest and safest way to free up space is to use a standard tool from Xiaomi. Security is already preinstalled in the system and optimized for working with the MIUI shell.
Launch the program and click on the large Cleanup button, and the scanner will quickly analyze the device for temporary files, advertising debris, and residual data from APK installation packages.
Once scanned, the system will suggest removing the debris found, but don't rush to agree to all the proposed actions, carefully study the list. Some files may be important for the correct operation of certain services.
☑️ Cleaning Algorithm Through Security
In the Deep Cleanup section, you can find large files that you haven't used in a long time and delete them, and there's also a feature to clean similar photos, which helps to remove duplicate images.
Regular use of this tool, at least once a week, will help keep the system clean. Auto cleaning can be configured in the application settings to run in the background.
⚠️ Note: Deep Cleaning may suggest you delete files you recently downloaded but haven’t seen yet, so always check the list before confirming.
Remember that cleaning the app cache through this tool does not delete your personal data, logins and passwords; these are only temporary files that are created anew during the use of programs.
Cache and application data management
The most voracious elements in a smartphone are social networks and instant messengers, apps like Telegram, Viber or Instagram accumulate a huge amount of data, which often exceeds the size of the program itself by dozens of times.
To clear the cache of a particular application, go to Settings, then select Apps and find All Apps. From the list, select the desired program and click on Memory.
Here you will see two buttons: Clear cache and Clear (or Reset) The first deletes temporary files, the second completely resets the application to the state of "as after installation", removing logins and correspondence.
What is the difference between cache and data?
For instant messengers, it is better to use built-in cleaning tools. For example, on Telegram you can go to Settings → Data and memory → Memory Use and clear the cache by setting up automatic deletion of old files.
On WhatsApp, a similar feature is in Settings → Data and Storage → Storage Management. Here you can select specific chats and delete only heavy videos or documents, leaving text messages.
Regularly checking heavy applications keeps the system on track, and if you rarely use a program, it’s easier to uninstall it completely and re-install it if necessary than to store gigabytes of bloated cache.
Work with gallery and heavy files
Media is the main consumer of space on any modern smartphone. The Redmi 9A camera takes good pictures, but they take up space, especially when shooting in high resolution or recording video.
First, check the Screenshots and Downloads folder, and it often contains hundreds of unwanted images, memes, and images that you've long forgotten about.
Use the gallery-sized sorting function to quickly find the long videos that occupy the most space and delete them or transfer them to your computer.
- 🗑️ Remember to clean the folder "Recently deleted", files are stored there for 30 days.
- 📹 Video in resolution 1080p It takes up much more space than the photo.
- ☁️ Use cloud services to store archived photos.
- 📂 Compress rare documents before sending or storing them.
If you’re a social media user, check TikTok, Instagram, and Facebook folders in the file manager, which often saves copies of all videos you’ve watched to hidden folders.
For those who like to store music and movies offline, an external memory card is a great solution, and internal memory is best left for the system and applications to ensure performance.
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Turn on HEIF for photo and H.265 for video in your camera settings, which will save high-quality media files while taking up half the space.
Use of the SD-memory-extension
The Redmi 9A features a separate microSD card slot, a huge plus for the budget segment. Installing a 32, 64 or 128GB card is a game-changer.
Once the card is installed, the system will suggest you configure it, and you can use it as a portable storage (for photos, music, video) or as part of internal memory (extension).
It is recommended to transfer the camera and voice recorder to record files immediately on SD-To do this, go to the camera settings and at Save on SD-card activate the switch.
| Type of data | Recommended seat | Reason. |
|---|---|---|
| System applications | Internal memory. | Ensures stable operation of MIUI |
| Photos and videos | SD-map | Makes room for the system |
| Music and Films | SD-map | Media players work easily with external media |
| Cash messengers | Internal/SD | Depends on the settings of the application itself |
Some apps allow you to transfer yourself to the memory card completely. → Apps, select the program and if the button Move to SD-The card is active, use it safely.
But remember, the speed of memory cards is lower than that of the built-in drive, so you don't have to put heavy games or programs on the map that you use all the time, or you'll notice slowdowns.
Radical methods and reset to factory settings
If none of these methods worked, and the memory is full again, the last and most effective option is a complete reset, which will return the phone to the state it was at the time of purchase.
Before performing this procedure, be sure to create a full backup of all important data to your computer or the cloud, as in the process everything will be deleted: contacts, SMS, photos and installed applications.
To reset, go to Settings → About Phone → Reset. Select Erase All Data. The system will request confirmation and input of the screen unlock password.
⚠️ Warning: Make sure the battery is at least 50-60%, Since the reset and initial setup process can take a long time and the phone should not turn off.
Once you reboot, you'll get a clean system. In the first hours of use, don't install all the apps at once. You'd better just put what you need to control what's starting to take up space.
A common reason for quickly filling up memory after a reset is sync. If you have 20 GB of photos in the cloud, your phone may try to download them all back. Set up Wi-Fi-only sync or select selective download.
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Hard Reset is the most effective way to remove all the software debris accumulated over the years of use, but it requires a mandatory data backup.