Redmi 9A series smartphones from Xiaomi are known for their availability and reliability, but the limited amount of internal memory often becomes a serious obstacle for users. When the gadget is full of photos, videos and application cache, the system begins to work slower, and notifications about lack of space appear more often. It is at such moments that the owner is faced with the question of how to effectively find and free internal storage.
The Android operating system, complemented by the proprietary MIUI shell, provides powerful tools for monitoring the occupied space, but they are not always obvious to beginners. Standard icons can be hidden, and the settings menu can change its structure depending on the firmware version. Understanding the architecture of your file system Redmi 9A is the first step to speeding up your device without having to buy a new phone.
In this guide, we will analyze in detail all possible paths to access files, explain the difference between system and user memory, and also teach you how to correctly transfer data to external media. You will learn which folders can be deleted without risking the operation of the system, and how to use built-in analyzers to search for “heavy” files that quietly eat up gigabytes.
Accessing memory settings through the system menu
The most reliable and informative way to assess the state of memory is to access the standard settings of the operating system. This is where the most accurate information about the distribution of space between applications, images, audio files and system data is displayed. First, you need to unlock the device screen and find the standard application Settings, which usually looks like a gear.
In the list of options that opens, scroll down to the section About phone or immediately find the item Storageif it moved to the main menu. In the version of MIUI installed on Redmi 9A, the path often looks like the sequence: Settings → About phone → Storage. Here you will see a color chart visualizing disk usage.
⚠️ Warning: Do not try to delete files from system partitions marked as reserved or system, even if you have access rights. This may lead to a cyclic reboot of the device.
The storage management screen displays not only free space, but also details by category. You can see that messengers like WhatsApp or Telegram, which save all received media files, take up the most space. By clicking on any category, you will be taken to a deep management menu where sorting by size and date is available.
Use the button Cleaning, which is often offered automatically by the system when the fill level is critical. This tool is safe as it removes only temporary files, remnants of uninstalled applications and ad junk without affecting your personal documents.
The system settings menu is the only source of reliable information about which applications are taking up the most space on your Redmi 9A.
Using the File Explorer app to manually search
For more flexible file management, which is not limited only to categories created by the system, you must use a file manager. On Redmi 9A smartphones, by default, the application (File Manager) from Xiaomi is installed, which has convenient access to the root folder structure. Explorer (File Manager) from Xiaomi, which has convenient access to the root folder structure.
When you launch the application, you will see two main sections: categories (Images, Videos, Documents) and folder structure. To search for specific hidden or forgotten files, go to folder view. Here you will find internal memory, which is often referred to as Internal Storage or Internal storage.
- 📁 Folder
DCIM—all photos and videos taken with the phone’s camera are stored here. This is the first place to look for large files. - 💬 Folder
Android—contains application data, including cache and configuration files. Be careful when deleting the contents of a subfolderdata. - 📥 Folder
Downloadis the standard storage for all files downloaded from the browser or received through instant messengers.
Navigating through folders allows you to find the remains of deleted apps or forgotten APK installation files, which can occupy hundreds of megabytes. Unlike system settings, File Explorer allows you to select groups of files and bulk move or delete them. This is especially useful when you need to quickly free up space before recording an important video.
Pay attention to hidden folders whose names begin with a dot. To see them, you need to activate the item Show hidden filesin the settings of the explorer itself. Often there may be error logs or temporary copies of documents that the user no longer needs.
Storage Analyzer: search for the heaviest files
The built-in Storage Analyzer tool is a powerful MIUI mechanism that allows you to quickly identify memory “eaters”. Unlike standard folder browsing, it ranks files by their weight, regardless of the directory in which they are located. You can find this tool through the app Security, which is preinstalled on all Redmi.
After starting the scan, the system will offer to clear the garbage, but we are interested in the section Deep cleaning or Storage management. Here the files are sorted by size: the heaviest videos, archives and installation packages will be on top. This allows you to instantly find a forgotten 2 GB movie that is in the downloads folder.
The peculiarity of the analyzer is that it groups duplicates. If you accidentally downloaded the same document several times or took a series of identical pictures, a smart algorithm will suggest deleting the copies, leaving the original. This is a safe way to get back up to 10-15% of free space.
⚠️ Attention: The analyzer interface may vary slightly depending on the MIUI version. If you don’t find the “Deep Cleaning” item, look for a similar section in the “Security” application settings.
You should also pay attention to the “Large Files” section. The system automatically finds all objects weighing more than 100 MB. Often there are offline maps of navigators or a cache of streaming services, which can be cleared without losing personal account data.
Working with an external SD card on Redmi 9A
The Redmi 9A model supports the installation of microSD memory cards, which is an excellent solution to the problem of lack of built-in storage. However, in order for the phone to correctly display and use the new drive, it must be properly formatted and configured. Insert the card into the slot (combined with the SIM card tray) and wait for the system notification.
After detecting the media, the system will offer to use it as Portable storage or as Internal storage. The first option allows you to use the card to transfer photos, music and documents, while maintaining the ability to read it on other devices. The second option encrypts the card, making it part of the system, but it will not be readable on another phone.
To transfer existing files, use Explorer. Select the desired folders (for example, gallery), click the menu (three dots or stripes) and select Move. Set the destination path to your SD card. The process may take time depending on the amount of data.
| Data type | Recommended location | Risk of loss | Access speed |
|---|---|---|---|
| Photos and Video | SD card | Medium | Medium |
| System applications | Internal memory | Low | High |
| Music and books | SD card | Low | High |
| Game cache | Internal memory | High | Very high |
It is important to periodically check the status of the memory card. In the menu Settings → Storage you can run an error check. If the card is slow or files are no longer readable, it may be time to replace the media with a more modern and fast one.
Use memory cards with a speed class of at least Class 10 or UHS-I to avoid slowdowns when recording 4K video or running heavy applications from the card.
Clearing cache and application data
Social networks and instant messengers tend to grow to gigantic proportions. Telegram, WhatsApp, Viber and TikTok save every image and video you view in a cache. Over time, this “garbage” can take up 5, 10 and even 20 gigabytes, although functionally this data is no longer needed.
To find and clear this data, go to Settings → Applications → All applications. Select a heavy application (for example, Telegram) and click on the item Memory. Here you will see two buttons: “Clear cache” and “Clear all data.”
Clearing the cache is safe: you will not lose correspondence or logins, it will simply delete temporary files that will be downloaded again if necessary. However, the button Clear all data will return the application to the "just installed" state, removing all history and authorization. Use it only if you want to completely reset the app.
☑️ Safe cleaning checklist
There is also an internal cleaning for messengers. Going into the settings of Telegram or WhatsApp itself, find the section Data and memory → Memory usage. There you can clear the cache selectively, for example, by deleting only the video, but leaving the photos. This is a more subtle tool than the system one.
⚠️ Attention: Before clearing application data, make sure you remember the password for your account, as you may need to re-authorize.
Hidden folders and system junk
Folders with names like .thumbnails or MIUI/.galleryare often hidden deep within the Android file system. They store thumbnails of your photos for quick display in your gallery. If you have thousands of pictures, the size of such a folder can reach several gigabytes.
You can find them only by turning on the display of hidden files in Explorer. The path usually looks like this: Internal memory → DCIM → .thumbnails. The contents of this folder can be safely deleted: the system will automatically create new thumbnails when you open the gallery, but this will free up space right now.
It is also worth checking the folder MIUI/debug_log. In some firmware versions, system error reports may be recorded there. If you are not a developer and do not specifically debug your phone, you do not need these logs, and deleting them will not affect the stability of the Redmi 9A.
Why does the memory fill up again immediately after cleaning?
This often happens due to background running of applications. Messengers continue to download media, and the system continues to create new logs. Regular cleaning or disabling autosave in application settings solves this problem.
Another source of hidden garbage is the folders of deleted applications. When uninstalling apps, some of them leave behind folders with settings or a cache in the root of the internal memory. Periodic manual inspection of the root directory helps to find such “tails” by the brand names of already deleted games.
Use of cloud services for offloading
A modern approach to managing storage on Redmi 9A involves the active use of cloud technologies. The Google Photos service, pre-installed on your smartphone, allows you to store an unlimited number of photos in a compressed (but high-quality) format, freeing up space on your device.
Activate the "Free up space" function in Google Photos settings. The application will analyze the gallery, find pictures that are already saved in the cloud, and delete their local copy from the phone. This instantly frees up a significant amount of space without the risk of data loss.
The Xiaomi Cloud (Mi Cloud), which is integrated into the system, works similarly. It can sync contacts, messages, notes and voice recordings. By setting up automatic synchronization, you can be sure that even if your phone is lost or broken, your data will remain accessible from any other device via a browser.
Cloud storage is not just a backup copy, but a full-fledged expansion of the memory of your smartphone, allowing you to store terabytes of data without purchasing expensive memory cards.
Do not forget that cloud services require a stable connection to work to the Internet. It is recommended to set up synchronization of large amounts of data (for example, initial backup) via Wi-Fi so as not to waste mobile traffic.
Why does the Redmi 9A constantly run out of memory, although I don’t download anything?
The main reason is the application cache and system logs. Messengers, browsers and social networks accumulate temporary files every time they are used. The Android system also creates swap files. Regular cleaning through the built-in tools solves the problem.
Is it possible to transfer all applications to an SD card on Redmi 9A?
It is impossible to completely transfer all applications. System applications and some MIUI components must remain in the internal memory for stable operation. Regular user applications can be transferred through the "Applications" menu if the developer has allowed this.
Is it safe to delete the Android/data folder?
You cannot delete the folder itself - it stores game and app data. You can delete contents inside folders of specific applications that you no longer use, but it is better to do this through standard application deletion in the settings.
How to find the exact path to hidden folders without .root access?
root access is not needed to view hidden folders. In standard Explorer, just click on the three dots in the corner and select “Show hidden files.” All system folders will become visible for viewing, but write access to some of them will be limited by the security system.
What to do if the phone says “Memory is full”, but the files are not found?
Most likely, the space is occupied by the “Other” section or the system cache. Try rebooting your phone into safe mode or clearing the recovery partition cache. Also check if large files are stuck in the messenger sending queue.