How to Free Your Memory from Xiaomi Redmi 9: The Complete Guide

Xiaomi smartphone owners often face a situation where the device starts to run slower and notifications of space shortages appear more often.Redmi 9, with a modest amount of built-in storage in the basic versions, is especially sensitive to filling the system partition.When free space runs out, the MIUI operating system blocks the installation of new applications and may even refuse to take photos.

Memory cleaning is not just about removing old photos, but about a comprehensive system maintenance process. In this article, we will discuss effective methods to help return performance to your gadget, learn about hidden shell features, safe ways to remove system debris and the nuances of working with multimedia files.

It's important to understand that RAM and embedded storage (ROM) are different things, and the methods of releasing them are different. We're going to focus on the internal drive where your data, applications and system files are stored, and managing these resources properly will extend the life of your smartphone.

Analysis of storage occupancy through settings

The first step is always to diagnose. Before you delete anything, you need to understand what is taking up precious gigabytes. The MIUI shell has a built-in analyzer that visualizes the distribution of data. Go to Settings → About Phone → Storage to see a detailed employment map.

The system automatically sorts files into categories: apps, images, videos, documents, etc. Often it turns out that the lion's share of space is occupied not by installed programs, but by the messenger cache or forgotten downloads. Visualization helps to quickly identify the "eaters" of space that are not obvious when you normally view a gallery.

Note the "Other" section, which sometimes hides remnants of deleted programs or temporary update files, and if this partition takes up an abnormally large amount of space, you may need to clean the device more deeply or restart it in safe mode to detect file system errors.

Use of the built-in Security application

Each Xiaomi smartphone has a Security system app preinstalled, which includes a powerful cleaning tool. Launch it and press the Clean button. The scanner will automatically find temporary files, remnants of deleted apps and ads.

But automatic cleaning is often superficial. For a deep analysis, click on the Garbage icon at the bottom menu and then select Deep Clean. Here you can see large files, duplicate photos and unused ones. APK-Big Files allows you to find videos over 100MB that you may have forgotten existed.

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Do not delete files with the.obb or.data extension in the Android folder unless you are sure they belong to the remote game, which can lead to loss of progress in games that are still installed.

In the same section, you can clear the cache of specific applications, for example, YouTube or Instagram can accumulate gigabytes of temporary data to quickly load the tape. Regularly cleaning the cache of these applications is safe and does not delete your logins or passwords.

Cleaning up garbage in popular messengers

The most active memory consumers on Redmi 9 WhatsApp and Telegram, by default, store all received media files in the memory of the phone. WhatsApp/Media or Telegram/Telegram Images are growing to incredible sizes.

Inside WhatsApp itself, there's a handy storage management feature. Go to Settings → Data and Storage → Storage Management. Here you'll see a chat list sorted by volume, you can select a specific group or contact and only delete heavy videos, leaving text messages.

Telegram makes things even easier thanks to the cloud nature of the service, so you can set a cache limit or enable auto-delete in the app settings (Data and Memory → Memory Use), and you can also turn off auto-save media in the gallery so that photos from the channels do not duplicate into the DCIM system folder.

⚠️ Before mass cleaning chats in messengers, make sure that important documents and work files are stored in the cloud or sent to Favorites. After cleaning on the device, they may disappear without recovery if they were not uploaded to the cloud backup.

Removal of duplicates and sorting of photos

Gallery is the second most common source of memory overflow after messengers. Often users take multiple identical shots in the hope of getting the best shot, forgetting to delete the unsuccessful ones. MIUI has a built-in tool for finding duplicates, but you can also use third-party solutions or Google Photos.

Note the Screenshots folder, which we often take screenshots of tickets, correspondence, or recipes that are only valid for a couple of days, and auditing this folder regularly allows you to free up hundreds of megabytes, and also check the DCIM/.thumbnails folder, which stores thumbnails that sometimes take up more space than the originals.

To optimize photo storage, we recommend using the “Free space” feature in the Google Photos app, which removes from the device those pictures that are already securely stored in the cloud account, allowing you to access all photos over the Internet without taking up the physical memory of Redmi 9.

Management of applications and their data

Apps take up space not only with their installation file, but also with the data they generate as they go. Go to Settings → Apps → All apps. Sort the list by size. Heavy games and social media often take 1-2 GB.

If you need an app but it takes up too much space, try pressing the Clean button (not Delete, but clear the data or cache) and it will return the program to the "just installed" state, saving the binary itself, but removing the temporary debris. The cache can be cleaned safely, but Data will delete your logins and settings inside the application.

Consider using Lite versions of popular apps. Facebook Lite, Telegram Lite or Google Go take up significantly less space and consume less RAM, which is critical for the Redmi 9 with its 3 or 4 GB of RAM.

Transfer files to external media and to the cloud

If the internal memory is absolutely not enough, the most reasonable solution will be the use of external resources. Redmi 9 is equipped with a slot for microSD cards. Buy a card with a capacity of 64 or 128 GB and set up the phone to record photos and install new applications (if the Android version allows) on it.

Cloud storage is another effective method: Google Drive, Yandex.Disk or MI Cloud allow you to transfer archives of documents and rare photos to the Internet. Set up automatic folder synchronization so that new files immediately fly to the cloud, freeing up local space.

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Using a MicroSD card is the only way to physically increase the amount of storage available on Redmi 9 without losing data.

Don't forget your computer. Once a month, plug your phone into a USB and copy old video archives and photo reports from events to your PC's hard drive, which makes sure files aren't lost and frees up gigabytes on your smartphone for current tasks.

⚠️ Note: When formatting a memory card as “internal memory” (if available in your version) MIUI), It's encrypted and it's tied to this particular phone, and you can't read it on another device without completely resetting it.

Radical measures: Resetting to factory settings

If none of these methods worked and the system continues to slow down, the last resort is a full reset, which will bring the phone back out of the box, removing all the user data, apps and garbage that has accumulated over the years of use.

Make sure to make a full backup before the procedure. Use the built-in Mi Backup app or sync with your Google account. Save important contacts, phone numbers and photos. Once reset, you can restore them from the backup you created.

To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The process will take 10-15 minutes. Once turned on, you will get a clean system that will work as fast as possible, like on the first day of purchase.