How to effectively free up memory Xiaomi Redmi Note 9

Owners of the Xiaomi Redmi Note 9 smartphone often face a situation where the device starts to work slower, and notifications of lack of free space appear more often. Internal memory is filled with system debris, app cache and heavy media files, which requires immediate intervention. Cleaning up storage is not just a way to get rid of excess, but also a necessary procedure for the stable operation of the MIUI operating system.

Don't panic if you see a red disk occupancy indicator. There are many proven methods to safely delete excess data without losing important information. In this article, we'll look at the algorithms that will help return performance to your gadget.

First, you need to understand what's taking up space. Android and MIUI store temporary files in the process, which often remain even after you shut down programs. Manual cleaning combined with automated tools will give you the best result.

Use of the built-in Security application

The easiest and safest way to start vacating space is to use a developer's regular tools, and every Redmi smartphone has a Security app preinstalled, which has the ability to analyze disk space.

Run the program and select Cleanup. The system will automatically scan the device and find temporary files, remnants of deleted applications and other digital debris. Press the Cleanup button to remove the objects found.

However, standard cleaning often does not affect large files that the user downloaded manually. For a deeper analysis, go to the Memory or Storage tab in the phone settings, where you will see a detailed data distribution diagram.

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Use the built-in cleaner regularly, at least once a week, to prevent critical memory filling with system debris.

And look at the Other section, which is often where forgotten downloads and messaging files are hidden, and storage analysis allows you to visually measure which categories are the most gigabytes.

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The built-in Security tool only deletes temporary files, but does not touch your personal photos or documents, making it safe for daily use.

Cleaning the cache and application data

Social networks and instant messengers like Telegram, WhatsApp and Viber are the main consumers of free space, and they store every image and video they view into cache memory, which can grow to several gigabytes over time.

To clear the data of a particular application, go to the Settings menu. → Annexes → All apps. Find a heavy program like YouTube or Instagram on the list and click on it. Select Memory and then Clear Cache».

• 📱 Cache – temporary data that speeds up the load, their removal is safe and does not affect logins.
• 🗑️ Data – Complete reset of the application to factory state, including saved passwords and settings.
• ⚙️ Storage management – a feature within some applications for selective media cleaning.

It's important to distinguish between cache cleaning and data cleanup, so if you delete messenger data without a prior backup, all correspondence will be lost, and cache can be deleted without restrictions.

There is a separate built-in cleaning mechanism for Telegram messenger. Go to Settings → Data and memory → Memory Use. There you can set up automatic cache deletion, for example, after 3 days or a week.

Work with gallery and heavy media files

High-resolution photos and videos are the main reason for the lack of space on the Redmi Note 9. The camera of the smartphone takes high-quality pictures that take up a significant amount of space.

First of all, check the Recycle Bin folder in the Gallery app. Deleted photos are often stored there for another 30 days, continuing to occupy space.

Use the Albums feature to sort, and you can often find duplicates or failed shots from a series, and even deleting a dozen minutes of video can free up hundreds of megabytes.

Consider transferring your photo archive to a computer or external drive. If you have access to a PC, plug your phone in. USB-cable and copy the folder DCIM hard-drive.

Use of cloud storage

The current approach to memory scarcity is to use cloud technologies, such as Google Photos or Yandex.Disk, which allows you to store media files on remote servers, leaving only thumbnails on your phone.

Set up automatic gallery sync with the cloud. Once the photos are uploaded, the “Free Space” feature in the Google Photos app will remove the originals from the device, leaving them available for viewing over the Internet.

This solution is ideal for those who do not want to constantly think about the free space. Cloud storage guarantees the safety of data even in the event of loss or breakage of a smartphone.

Keep in mind that cloud services require a stable connection to Wi-Fi or mobile Internet, and with a large amount of data, it can take time to download the initial download.

Finding and Deleting Duplicate Files

During active use of the smartphone, copies of the same files often occur, this can occur when you save documents from different sources or when you transmit data via Bluetooth.

You can use file managers like Total Commander or Explorer to find duplicates, and look for files with the same size and name, but in different folders.

• 🔍 Check the Download folder – there are often repeated downloads of app installers.
• 📂 Sort files by size so you can see the heaviest copies right away.
• 🗑️ Remove duplicates carefully, making sure the original is saved.

There are specialized cleaning apps that can find similar images even at different resolutions, but beware: these programs may be wrong and suggest removing an important original.

Pay special attention to messenger folders. On WhatsApp, for example, the same image sent to different chats can be saved as a separate file in each dialog folder.

Transfer applications and files to a memory card

The Redmi Note 9 features a microSD card slot, a great way to expand storage for photos, videos and music, while offloading the system’s internal memory.

To transfer data, insert the card into the slot (usually combined with the second). SIM-After formatting in the system, when moving files to the gallery or file manager, choose as destinations «SD-map».

⚠️ Note: Not all applications can be migrated to a memory card. Android system restrictions often prohibit the transfer of executable program files, leaving this option only for multimedia.

Configure your smartphone camera so that new photos and videos are saved by default to an external drive. → Save and select SD-map.

Using a U3 or higher memory card will allow fast, high-resolution video recording, and cheap and slow cards can cause delays in shooting.

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Transferring media files to a memory card is the most effective way to free up internal storage without deleting data.

Radical methods: Reset to factory settings

If none of these methods worked and the memory is filled up instantly, there may be a critical error in the system, in which case a full reset, or Hard Reset, helps.

This procedure will return the phone to a store-like state, delete all user data, accounts, apps and files, so make sure to back up important information before you start.

Settings → About the phone → Reset settings → Erase all data

Once reset, the phone will work as fast as possible, install only the necessary applications so that the problem does not recur anytime soon, which is an extreme measure, but often the only true measure when the system is bloated.

⚠️ Warning: Before resetting, make sure that the battery is at least 50% so that the phone doesn’t turn off during the system upgrade process, which could cause a breakdown.

Remember, it takes time to set up and index files after the reset, and don’t worry if the phone is slow in the first few minutes, which is normal.

Frequently Asked Questions (FAQ)