Modern Xiaomi smartphone users often face a lack of free space, even if the device has an impressive amount of internal storage. One of the hidden reasons for memory overflow is the accumulation of multimedia attachments in correspondence, app cache and old SMS messages that are stored in the system’s database for years. Cleaning up this data not only frees up gigabytes of space, but also significantly speeds up the interface, eliminating the processor from unnecessary load when indexing files.
In this article, we will take a look at all the available methods for cleaning up memory related to messages, from standard MIUI settings to advanced developer tools. You will learn how to safely remove unnecessary dialogues, clean the media cache in MMS and prevent the re-accumulation of junk files. It is important to understand that the proper hygiene of digital space prolongs the life of your device’s drive.
Before we start taking radical action, we need to look at what's taking up space. Often, users forget that when you delete the dialogue in a standard application, attachments can stay in the gallery or hidden folders of the system. We'll look at a comprehensive approach that ensures that you completely remove the traces of correspondence and optimize HyperOS or MIUI.
Memory Analysis: What Messages Take
Many smartphone owners mistakenly believe that text messages weigh negligible. However, in the Android ecosystem, which Xiaomi runs on, the situation is more complicated, with each incoming or outgoing message with an attachment (picture, video, voice) stored in several copies: in the application database, in the preview cache, and often duplicated in the system download folders. Over time, this snowball can grow to several gigabytes.
Special attention should be paid to the RCS (Rich Communication Services) protocol, which replaced conventional SMS, which allows you to transfer high-quality files that are automatically stored in the memory of the device. If you are actively using Google Messages or similar applications from Xiaomi, check the attachments folder. This is where most often forgotten videos and documents received years earlier are hidden.
⚠️ Before a mass cleanup, make sure that no important documents or photos are among the attachments that have not been stored in the cloud. Deleting the dialogue often leads to the irretrievable loss of all the attached files.
To get a good idea of the situation, we recommend using a built-in storage analyzer that will show not only the amount of data the app is using, but also the size of user data, which is a key parameter, since user data contains the history of your correspondence and media files.
- 📱 Standard SMS takes up a minimum of space, but their number can slow down the database.
- 📸 MMS and RCS-Photo and video messages are the main memory consumers in the message section.
- 💾 Cache preview images can weigh more than the original files due to optimization.
Understanding the structure of data storage allows you to act point by point. You don't have to delete everything; you just need to find and eliminate the most "heavy" elements to get the desired result without losing important text information.
Removing SMS and MMS via a standard application
The most obvious but often ignored method is manually cleaning through the application interface. In Xiaomi smartphones, this is usually the responsibility of the Messages or Google Messages app, depending on the firmware version and region. The removal process can vary, but the logic remains the same for all versions of MIUI.
To start, open the messaging app and go to the list of all the dialogs, where you can delete entire branches of correspondence, hold your finger on the unnecessary dialog until the selection menu appears, then tick all the required contacts and click the shopping cart icon, which will delete the text history, but does not always affect attachments if they were saved separately.
☑️ Pre-deletion check
Deeper cleaning is available within a specific dialog. Open the correspondence, click three dots in the corner of the screen, and select "Chat settings" or "Media files." Here you will see a list of all the files sent and received. You can select specific heavy videos or groups of images and delete them, leaving the text portion of the correspondence intact. This is especially true for MMS, where the weight of the content plays a crucial role.
There's also an automatic deletion feature that some versions of the app have in their settings, so when you activate it, you can set a limit, like only storing the last 1,000 messages or messages up to 30 days old, and the system will automatically delete old posts, freeing up space in the background.
- 🗑️ Massive dialog deletion frees up space in SQLite database.
- 🎞️ Removing video from chat rooms gives the largest increase in free space.
- ⚙️ Autodelete setting prevents future memory overflow.
After cleaning, it is recommended to restart the device, which is necessary in order for the Android file system to correctly recalculate the free space and update the indexes, otherwise the displayed memory amount may not change immediately.
Cleaning the cache and data of the message application
If manually deleting the dialogs didn’t work, the problem could be in the bloated cache of the app. Cache is a temporary file that speeds up the loading of commonly used interface elements and previews of images. However, over time, it can become fragmented and take up an unnecessarily large amount of space, especially after long periods of use without reset.
To clear the cache, go to your Xiaomi smartphone Settings. Find the Apps → All Apps. Find your messaging app (e.g., "Messages" or "Messages"). Go to the app information page and select Memory or Storage. Here you will see the two main buttons: "Clear Cache" and "Clear Everything" (or "Delete Data").
Pressing the Clear Cache button is safe and only deletes temporary files. Your messages and contacts will remain in place. This is the recommended first step to resolve application performance issues. If you choose Clear Everything (Delete Data), the application will return to a state immediately after installation: all settings will be reset, and the local message base deleted (although SMS is often restored from the system backup on the next launch, but relying on it is risky).
⚠️ Attention: Clear Everything can erase notification settings, spam number blocking, and message drafts, and use this method only if other methods have not helped.
For users who are actively using MMS, cache cleaning is especially important. Media previews can take hundreds of megabytes. Regular preventive cache cleaning (once a month) helps keep the system on track and avoid sudden errors when opening a message application.