Modern smartphones Xiaomi have huge amounts of built-in memory, but even 256 or 512 gigabytes can unexpectedly run out. One of the most common, but not obvious, causes of storage overflow is the accumulation of old text messages. Many users do not even suspect that thousands of received pictures, stickers and long correspondence take up precious space in the system partition.
Operating system MIUI or new HyperOS manages application data, including the standard messenger, differently. Over time, the SMS database grows, which can lead not only to a lack of space, but also to a noticeable decrease in the speed of the interface. In this article, we will look in detail at how to safely and effectively clear message memory, removing unnecessary information and preserving important information.
The cleaning procedure does not require receiving root access or connecting to a computer. All actions are performed directly on the device through standard settings or third-party utilities. It is important to understand the difference between deleting the message text itself and clearing the application cache, since these processes affect the system in different ways.
Analysis of used storage space
Before you start deleting data, you need to determine exactly how much space your correspondence actually takes up. The standard file manager does not always correctly display the size of the SMS database, so it is better to use the built-in system analytics tools. Go to the menu Settings → Storageto see a detailed breakdown of file types.
In the memory usage section, find the “Messages” or “SMS/MMS” item. The total weight of all text and multimedia messages is displayed here. If this figure exceeds several hundred megabytes, this is a clear signal to action. MMS messagesthat contain images or audio files sent via a mobile network take up especially much space.
It is worth noting that in new firmware versions statistics can be combined with other system data. In this case, the total volume may be hidden in the "System Data" or "Other" categories. For more accurate diagnostics, you can use third-party disk analyzer applications that visualize storage occupancy.
⚠️ Attention: Before large-scale cleaning, make sure that there are no confirmation codes from banks or important work instructions among old messages. It is almost impossible to recover deleted SMS without a preliminary backup.
Analysis shows that users often store correspondence for years without realizing their weight. One long dialogue with many attachments can weigh more than a dozen installed games. Regularly checking this setting helps keep your device in optimal condition.
Manually deleting conversations through the Messages application
The easiest and most reliable way to free up space is to manually delete unnecessary dialogues directly in the application. Open the standard application Messages (envelope icon). On the main screen, you will see a list of all active and archived chats, sorted by last date.
To delete one conversation, tap on it and hold your finger for a second until the selection checkmark appears. After this, a toolbar will appear at the top of the screen. Click on the trash can icon or the "Delete" button. The system will ask you to confirm the action, since the operation is irreversible.
If your goal is to clear memory as quickly as possible, use the bulk allocation function. In some versions MIUI it is enough to double-tap on the message to activate the selection mode. You can then check off dozens of conversations at once and delete them with one click. This is especially convenient for clearing old spam.
- 🗑️ Deleting individual messages within a dialogue is possible by long pressing on a specific text bubble.
- 📅 Sorting by date helps you quickly find the oldest correspondence, which most often is no longer relevant.
- 🔍 Searching for keywords in the top line allows you to find messages from specific senders for targeted deletion.
Remember that deleting a conversation erases the entire history of correspondence with this contact. If you need to save some information and delete the rest, you will have to delete messages individually within the chat. This is a long process, but it guarantees the safety of important data.
Use the "Blocked" function in the message settings to automatically delete spam without clogging up the phone's main memory.
Clearing the cache and data of the messaging application
In addition to the texts themselves, the messaging application accumulates temporary files, thumbnail images and logs work that makes up a significant part of the occupied volume. This data is stored in the application cache and can be safely deleted without losing chat history, although in some cases the notification settings may be reset.
To perform a deep clean, go to Settings → Applications → All applications. Find “Messages” in the list (or “Mi Messaging” / “Google Messages” depending on your firmware). Click on the application name to open the control card.
In the menu that opens, select “Memory” or “Storage”. You will see two buttons: “Clear cache” and “Clear all” (or “Reset”). Clicking on “Clear cache” will delete only temporary files, which is safe and often solves problems with application slowdowns. The “Clear all” button will delete both the cache and settings, but will not delete the SMS itselfsince they are stored in a separate system database.
| Action | What is being deleted | Impact on SMS | Recommendation |
|---|---|---|---|
| Clear cache | Temporary files, thumbnails | No | Safe, do regularly |
| Clear data | Settings, preferences | No (but reset settings) | If there are problems with the application |
| Delete the application | System updates only | No | Not recommended for system applications |
| Deleting a conversation | Conversation text and attachments | Full deletion | To free up space |
After clearing the cache, it is recommended to reboot the device. This will allow the system to correctly recalculate the free space and apply the changes. If the messages application continued to work incorrectly before clearing, this procedure often eliminates sending errors.
☑️ Checklist for safe cache clearing
Using the Security application for optimization
In the shell MIUI i HyperOS a powerful system application “Security” is preinstalled, which includes tools for cleaning up garbage. This tool can scan not only the cache, but also find large attachments in messages that can be deleted selectively.
Launch the application Security and select the “Cleanup” icon (usually looks like a broom). After the scan is completed, the system will show the volume of junk files. Scroll down to the Messages or Large Files section. Attachments from MMS that take up a lot of space may be displayed here.
The “Deep Cleaning” function offers a more detailed analysis. In this mode, you can see the "Old Messages" or "Spam" categories. The system offers to delete conversations that have not had any activity for more than 30 or 90 days. This is a great way to automate the process and not manually review thousands of contacts.
⚠️ Attention: The Security application interface may differ on global and Chinese firmware versions. In some regions, SMS deep cleaning functions may be limited due to privacy policies.
Using the built-in optimizer is preferable to installing third-party “cleaners”, which often contain advertising and themselves consume battery resources. The system utility has access to protected sections of memory, where third-party apps cannot penetrate.
Why is the space not freed up immediately after cleaning?
The system may display irrelevant data on free space until the next reboot or recalculation of storage indexes. Wait a few minutes or restart your phone.
Deleting MMS and multimedia attachments
The majority of memory in the messages section is occupied not by text characters, but by multimedia attachments. Photos sent via MMS, audio recordings and video files are saved in a special folder on the internal storage. Deleting the text of a message does not always automatically erase the attached file from the device memory.
To find and delete these files, open the application Explorer (File Manager). Go to the root directory and find the folder MIUI, and inside it - galery or cloud, where cached attachments may be located. Also check the path Android/data/com.android.mms/filesif you have access to this directory.
Often files are saved in a shared folder DCIM or Pictures marked MMS. Sort files by size. Files larger than 100 KB in message folders are candidates for deletion. Select them and delete them permanently.
- 📸 Photos in MMS are often duplicated in the gallery, check if you have already deleted them from there.
- 🎵 Audio messages can take up hundreds of megabytes if you often exchanged voice notes.
- 📹 Video files sent via MMS are of low quality, but heavy due to the lack of modern compression.
Regular checking of folders with attachments allows you to free up gigabytes of space. Unlike text SMS, which weigh kilobytes, one unsuccessfully saved video from an old message can weigh 50-100 megabytes.
Text SMS takes up negligible space; the bulk of memory is consumed by graphic and video attachments in MMS.
Automation of deleting old messages
To prevent the memory overflow problem from returning, you can configure automatic deletion of old messages. This feature is available in the settings of the messages application itself and allows you to limit the number of saved messages per contact person.
Open the application Messages, click on the three dots in the corner of the screen and select Settings. Find the "Advanced" or "SMS Settings" section. There will be an item “Delete old messages”. Activate this switch.
Once enabled, you can select a limit: for example, “200 messages per conversation” or “50 messages.” As soon as the number of messages in a conversation exceeds this limit, the system will automatically delete the oldest ones. This keeps the memory volume in a stable state without your participation.
Settings → Messages → Advanced → Delete old messages → ON → Limit: 200It is also worth paying attention to the MMS storage settings. Some firmware allows you to disable automatic downloading of attachments when using mobile data. This will prevent random spam pictures from clogging up your memory when you're not connected to Wi-Fi.
⚠️ Note: The auto-delete setting applies to all new and existing conversations. If you have important correspondence that you need to keep for years, add it to exceptions or disable the function for specific contacts, if such an option is available.
Frequently asked questions (FAQ)
Will chat history be deleted when you reset your phone?
Yes, a full reset to factory settings (Hard Reset) completely erases the entire user data section, including the message database, contacts and photos. Be sure to make a backup copy of important SMS before resetting.
Is it possible to recover deleted SMS on Xiaomi?
Recovery is only possible if you have a preliminary backup copy in the Mi Cloud or on your computer. Without a backup, restoring deleted messages is extremely difficult and requires the use of specialized software for working with memory dumps, which does not guarantee success.
Why does the memory fill up even if I deleted all messages?
It is possible that attachment files (pictures, videos) remained in the storage folders, since deleting messages from the application does not always clean the file system. Also, space may be taken up by the cache of other applications or system logs, which need to be cleared separately.
Does the number of SMS messages affect the speed of a smartphone?
Yes, the presence of tens of thousands of messages in one database can slow down the Messages application and increase the time it takes for the system to index the storage. This is especially noticeable on models with a small amount of RAM.
How to transfer SMS to a new Xiaomi phone?
Use the “Mi Mover” application to wirelessly transfer data from an old device. It allows you to transfer messages, contacts and applications without using a cable. You can also use backup via Mi Account.