How to effectively clean the memory of the Xiaomi Redmi 9

Modern smartphones like the popular Xiaomi Redmi 9 have powerful hardware and great screens, but even they are not immune to one of the most common problems: internal memory overflow. When storage is filled, the device starts to run slower, applications fly out, and the system constantly issues annoying notifications about space shortages. This is because the MIUI operating system requires a certain amount of free space for the background processes to function properly.

Redmi 9 owners often find that the basic version of the device has only 64 GB of memory, a significant part of which is occupied by system files. Over time, the user area is filled with junk files, duplicates and cache, which inevitably leads to lower performance. Understanding how to properly manage storage is a key skill to extend the life of your gadget without having to buy a new one.

In this article, we will take a look at all the cleaning techniques available, from simple built-in tools to advanced data transfer techniques. You will learn to find hidden files that take up gigabytes, and understand which applications are really eating up your resource. Memory freeing is not just about deleting photos, it is a comprehensive approach to system maintenance.

Analysis of storage occupancy through settings

Before you start deleting files, you need to understand what exactly occupies space on your Redmi 9. Android provides built-in tools for data visualization, but in the MIUI shell they have their own peculiarities. The first step should always be to audit the current situation so that you do not accidentally delete important system files.

Go to the settings menu and find the storage section, and here you'll see a color diagram showing different colors for data types: apps, images, video, audio, and system debris. By clicking on a particular sector, you can look at the content in detail. It often turns out that messengers or streaming services are the lion's share.

To access this information, follow the following steps:

• 📱 Open the Settings app on the main screen.
• 📂 Go to About Phone or select Warehouse (depending on version) MIUI).
• 📊 Study the memory distribution schedule and identify the most “heavy” consumers.

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Note the “Other” section – often it hides remnants of deleted apps or temporary update files that can be safely cleaned through the built-in cleaner.

Importantly, a standard analyzer may not show the full cache size of some applications, because they store data in secure directories. So visual evaluation is just the first step, and detailed analysis allows you to make an informed decision about what to delete first, without relying on guesswork.

Use of the built-in "Security" application

Every Xiaomi smartphone, including the Redmi 9, has a system application called Security preinstalled, and it's not just an antivirus, but a powerful system maintenance combine that includes an effective memory cleaner that scans the device for temporary files, remnants of remote programs and advertising debris.

Running deep cleaning through this tool allows you to quickly free up several gigabytes of space without risking damaging important data. The application's algorithms are configured to avoid affecting the user's personal photos and documents, focusing on system junk. Regular use of this feature helps keep the system in good shape.

The cleaning process is as follows:

• 🛡️ Find the Security icon (green shield) on the desktop).
• 🧹 Click on the Cleanup button and wait for the scan to be completed.
• ✅ Click the Clean Selected Files button to remove the found garbage.

⚠️ Attention: The Security app has a "Accelerate" function that closes the background applications, and you should not abuse it, since the constant forced shutdown of processes can, on the contrary, increase battery consumption, since the system will have to restart services.

Remember that automatic cleaning doesn’t always find all temporary files, especially when it comes to heavy game or video editor cache, but for daily maintenance, this tool is the safest and most recommended way to maintain order.

Cleaning cache and application data manually

The biggest memory consumers on Redmi 9 are usually social media and instant messengers. Telegram, WhatsApp, TikTok and Instagram store a huge number of temporary files to speed up the loading of content when re-viewed.This cache can grow to tens of gigabytes if left unchecked.

Unlike simple cleaning through the security menu, manual control allows you to selectively delete data, so you can clear the app cache without losing correspondence, or you can completely reset the application to a "just installed" state, which requires caution, but gives maximum effect.

For manual cleaning, follow the following steps:

• ⚙️ Go to Settings. → Annexes → All applications.
• 📱 Select a “heavy” app from the list (e.g. Telegram or YouTube).
• 🗑️ Click Storage and select Clear Cache or Clear Everything.

Special attention should be paid to the application Google Photos and Google Chrome. Browsers accumulate gigabytes of cache of visited sites, and the gallery stores thumbnails of all the images viewed. Regular cleaning of these two components can free up to 2-3 GB of space, which is essential for budget models with limited storage.

Working with files, photos and videos in the Explorer

Multimedia content is the bulk of the data that a user stores. On the Xiaomi Redmi 9, high-resolution, photos and videos take up a lot of space. The standard MIUI file manager allows you to quickly find large files and delete them by size or date.

Often, the Download folder accumulates APK installation files, saved documents from messengers and forgotten images from the Internet. The Explorer will help identify these files. It is also worth checking the DCIM folder for duplicates or failed shots that automatically entered the shopping cart.

Below is a table of the types of files that most often take up space and are subject to deletion:

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Before mass deleting photos, be sure to check the folder “Recently deleted” in the gallery – the files there take up space for another 30 days until they disappear completely.

Use the file sized sorting function in the Explorer to instantly find heavyweights, such as forgotten 4K video that can weigh 500MB. Deleting even five of these files will free up more space than cleaning hundreds of text documents.

Transfer data to memory card and cloud

If internal memory is severely lacking, the most reasonable solution for owners of Redmi 9 will be to use an external memory card microSD format. the Smartphone supports cards up to 512 GB, which allows you to move the entire media library there, freeing up the system partition for applications.

Beyond physical extension, you should consider cloud storage, services like Google Drive, Yandex.Disk or MI Cloud allow you to store photos and documents remotely, setting up automatic synchronization and then deleting local copies is the modern standard for memory management.

To transfer data to the map, perform:

• 💾 Insert the microSD card into the slot (together with the second one) SIM-card).
• 📂 Open Explorer and select files to transfer.
• 📤 Click Move and select a path on the memory card (SD Card).

⚠️ Note: When formatting a memory card as “internal memory” (if this option is available in your Android version), the data is encrypted and the card will not be read on other devices without reset".

Cloud technology allows you to not just store, but also optimize space, like Google Photos, which has a "Free Space" feature that removes images from your device that have already been successfully uploaded to the cloud, and it's safe and efficient.

Radical methods: Reset to factory settings

When software cleaning fails and the phone continues to slow down due to space shortages, the last proven method is a full reset to factory settings (Hard Reset), which returns the Xiaomi Redmi 9 to the “out of the box” state, removing absolutely all user data, applications and settings.

This is the most effective way to clear memory, as it eliminates any software errors, accumulated system debris and remnants of remote applications that may have “sit” in the deep layers of the file system.

Algorithm for resetting:

1. Make a full backup of important data to your computer or the cloud.
2. Go to Settings → About the phone → Reset settings.
3. Choose to erase all data and confirm the action with a password.

Remember, a complete reset is a point of no return, and if you haven't backed up your contacts, photos, and notes, they'll be lost forever, and use this method only when other methods have been exhausted or before selling your device.

Frequently Asked Questions (FAQ)