MSA-File in Xiaomi: destination, location and secure deletion

If you’ve ever been digging into the system folders of a Xiaomi smartphone, you’ve probably stumbled upon a mysterious file with the.msa extension. It takes several megabytes, does not open with standard applications and raises a lot of questions: what is this file, why does it appear and can it be deleted without harming the phone?

In this article, we will explain in detail what is MSA-Xiaomi file as it relates to work MIUI, Where to look for it and what the consequences of trying to get rid of it are, and you will learn how to distinguish between useful and useful ones» MSA-Files from potentially dangerous files, and what to do if they take up too much space on your internal drive.

Spoiler: Not all MSA-Some are responsible for the correct operation of Xiaomi services, others may be traces of deleted applications or even malware.

What is it? MSA-file in Xiaomi smartphones?

.msa (Mi System Archive) files are proprietary archive formats used in MIUI firmware to store data from system applications and services.

• 📦 Cache and customization of branded applications (Mi Browser, Mi Video, Security, etc.)
• 🔄 Updating components MIUI, loaded in the background
• 🔐 License keys for certain services (e.g, DRM stream)
• 📱 Configuration files for interaction with Xiaomi servers

Unlike the standard ones. APK or OBB, MSA-Files are not separate applications, they only work in conjunction with system components, they can not be installed manually or transferred to another phone. MIUI Reducing the load on the main storage.

It is important to understand that MSA-files are created automatically and are not viruses or junk, but in some cases they can inflate to hundreds of megabytes, especially if they are not viruses or junk:

• 🔄 You often update the firmware through Settings → The phone. → Update MIUI
• 📱 Use beta versions. MIUI (They generate more data from the service)
• 🔄 Remove system applications without proper cleaning (leaves the “tails” in the form of a “tail” MSA)

Where they're stored MSA-file?

The.msa files are distributed across multiple system folders, and their location depends on the MIUI version and the smartphone model, but they are most often found here:

To see these folders, you'll need root access or a file manager with superuser rights (like Root Explorer or Mixplorer). MIUI system directories are hidden.

If you do not plan to get root, you can use an alternative method:

1. Connect your phone to your PC through USB-Debugging (included in Settings) → The phone. → Version. MIUI → 7 times to tap according to the version → Additional settings → For developers → Debugging by USB).
2. Use the command adb shell ls /data/app/|grep msa in the terminal to see the list MSA-folder.

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Before exploring your system folders, back up your phone via Settings → Additional → Backup and Reset. This will help you recover your phone if something goes wrong.

Can I remove it? MSA-files and what the consequences will be?

The answer depends on the file and its location, and here are some clear recommendations:

• ✅ Safe to remove: 🗑️ Files in /sdcard/MIUI/msa/ — It's a temporary update cache. 📦 folder /data/data/com.miui.systemAdSolution/msa/ — Responsible for targeted advertising. 🔄 Remnants from remote applications (e.g. com.miui.browser.msa if you uninstall Mi Browser).
• ⚠️ Remove with caution: 🔧 Files in /data/app/·/msa/ — This can cause system applications to fail (e.g. Security or Gallery). 🔄 Archives in /data/app-lib/ — Sometimes used for compatibility with older versions MIUI.
• ❌ Never remove: 🚨 Any files in /system/priv-app/ or /system/app/ — This will lead to bootloop (the phone will not turn on). 🔐 Files named drm.msa, widevine.msa are responsible for the playback of protected content (Netflix, Disney, and others).+ etc.).

⚠️ Attention: If after removal MSA-File files the phone started to brake, overheat or issue errors such as "Security application stopped", immediately reset to factory settings via Settings → Additionally. → Backup and reset → Resetting: 90% of the time, it fixes the effects of incorrect cleaning.

If you are not sure if you can delete a specific file, use the following rule:

Don't delete. MSA-files that: 📅 Created or modified less than a week ago (they may be needed for ongoing processes). 🔒 Have in the name drm, widevine, security or framework. 📦 Located in folders with names that contain a priv-app or system.

Backup via Mi Cloud or locally|Check the space available on the phone (should be available) >10%)|Record paths to deleted files|Prepare a recovery tool (TWRP or Fastboot)|Make sure the battery is charged >50%-->

How to remove correctly MSA-Files without harm to the phone?

If you decide to clean up unnecessary MSA-So, you can follow this step-by-step instruction, and we're going to look at two ways: ADB (without root) and with Root Explorer.

Method 1: Removal via ADB (without root)

This method is suitable for files in /sdcard/MIUI/msa/ folders and some directories in /data/.

1. Install ADB and Fastboot Tools on PC.
2. Connect the phone to your computer and allow debugging over USB.
3. Open the command line (Windows) or terminal (macOS/Linux) and type: adb shell su (if root) rm -rf /sdcard/MIUI/msa/* rm -rf /data/data/com.miui.systemAdSolution/msa/*
4. Reboot your phone: adb reboot.

Method 2: Remove from Root Explorer (root required)

To work with system folders, you will need superuser rights.

1. Install Root Explorer or Mixplorer from XDA Developers.
2. Go to /data/app/ and find folders with the.msa extension.
3. Delete only those files that match the safe list from the previous section.
4. Clean the cart and restart the phone.

After removal, check the operation of the phone:

• 📱 Open the Settings. → Applications and make sure system programs run.
• 🎬 Try playing the video in Mi Video or streaming service (Netflix, YouTube).
• 🔒 Go to Settings. → Passwords and security – if the partition is opened, then critical files are not affected.

How to prevent recurrence MSA-file?

MSA-The files will be recreated if you don't limit their sources. Here are some working ways to reduce their number:

• 🔄 Turn off automatic updates MIUI: Go to Settings. → The phone. → Update MIUI. Slap the icon. ⚙️ Turn off the option "Automatic download via mobile network" and "Auto Update".

Block background activity of system applications:

• 🛡️ For Mi Browser, Mi Video, Security, disable Auto Start and Background Activity in Settings → Annexes → Application management.
• 🔧 Use Greenify or Brevent to force unnecessary processes to stop.

Remove unnecessary system applications (root required):

adb shell


pm uninstall --user 0 com.miui.browser # Removes Mi Browser




pm uninstall --user 0 com.miui.video # Deletes Mi Video

After they've been uninstalled. MSA-Files will stop updating.

If you don’t want to get root, the alternative is to disable personalized ads:

1. Go to Settings → About Phone → MIUI version (shap 7 times to activate developer mode).
2. Return to the additional settings → For developers.
3. Find the option “Disable personalized advertising recommendations” and activate it.

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Regularly clean the cache through Settings → Warehouse → Cleaning helps to reduce the size MSA-It doesn't delete all of the files, but it does.

MSA-Files and Security: Can They Be Harmful?

99% of the time. MSA-Files are legitimate components MIUI. However, there is a risk that malware may be masquerading as them, especially if:

• 🚨 The file appeared after installing the application from an unofficial source (not from Google Play or Mi App Store).
• 📅 The date of creation of the file coincides with the moment of suspicious activity (for example, traffic flow in the background).
• 🔍 The file name contains a random set of characters (for example, a1b2c3d4.msa instead of com.miui.browser.msa).

To check. MSA-virus-file:

1. Copy it to your PC (via adb pull /path/to/msa file).
2. Download to VirusTotal or check with an antivirus (like Kaspersky or Dr.Web).
3. If threats are detected, delete the file and install Malwarebytes to scan the phone.

⚠️ Note: Some “optimizers” (e.g. Clean Master or Clean Master) DU Speed Booster may be mistakenly marked MSA-files are like junk and suggest that you delete them. Don't agree - these programs often delete critical system data, which leads to crashes.

If you suspect that MSA-file is linked to a virus, but not sure if you use safe mode:

1. Turn off the phone.
2. Press the Power button and hold Volume down until the Safe Mode logo appears.
3. In Safe Mode, check if suspicious files have disappeared (many viruses don’t run without root rights).

Frequent questions about MSA-files in Xiaomi