How to completely clean the memory on Xiaomi Mi 6: from cache to system garbage

Why Xiaomi Mi 6 is so fast to fill memory – and what to do about it?

Xiaomi Mi 6, released in 2017, is still popular with users thanks to its powerful hardware (Snapdragon 835 processor, 6 GB of RAM) and a quality camera. However, even with 128 GB of internal memory, owners face a problem: storage is clogged “unknown what”, and free space is melting before our eyes.

Three key factors are MIUI architecture, automatic caching, and outdated cleaning algorithms. MIUI aggressively reserves space for system processes, and applications (especially social networks and instant messengers) create gigabytes of cache. In addition, the Mi 6 does not support memory cards, all the load falls on the built-in storage, but the good news is that up to 60% of the clogged memory can be freed up without root rights and data loss if you act systematically.

This article provides proven cleanup methods, from basic to advanced, with Mi 6 features (including MIUI 10-14 versions) to start with the simplest and get to the “heavy artillery”.

1. Basic cleaning: what can be manually removed?

Before you resort to radical measures, check out the obvious memory eaters. On the Mi 6, they're hiding in three places:

• 📸 Gallery and screenshots: MIUI automatically saves duplicate photos (for example, from messengers) and creates a Screenshots folder with hundreds of unnecessary screenshots.
• 🎵 Downloads: Download folder often contains outdated APK-file, PDF Archives that have not been opened for a long time.
• 📥 Telegram, WhatsApp and Viber have been storing media files for years – even if you deleted them in chat rooms.

How to clean:

1. Open the Files app (folder icon).
2. Go to the categories Images, Audio, Downloads.
3. Sort files by size (tap by three points → Sort by → Size).
4. Remove anything older than 6 months (except for important documents).

⚠️ Attention: Do not delete folders MIUI, Android DCIM/.thumbnails — This is system data, and cleaning it up could cause a camera or launcher to crash.

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Use the Storage Analysis feature in the Files app (the diagram icon at the bottom) to show which file types take up the most space and suggest a quick cleanup.

2.Cleaning App Cache: When Is "Clean Data" Dangerous?

Cache speeds up programs, but it grows to giant sizes over time, for example, Facebook can accumulate up to 2 GB of cache, and Google Play Services can accumulate up to 1 GB.

Cleaning instructions:

1. Go to Settings → Applications → Application Management.
2. Select an app (like Chrome).
3. Slip the vault. → Clear the cache.
4. Repeat for all programs in the list above (except MIUI Launcher).

⚠️ Warning: Never click Clear data for system applications (such as Settings or Phone) this will result in a reset of all smartphone settings.

Remove the old ones APK from the Download folder|Clear the YouTube and Chrome cache|Remove duplicate photos in DCIM/Screenshots|Clear the Telegram cache (not data!)-->

3.System Cleaning: Hidden MIUI Tools

MIUI has deep cleaning tools built in, but they're hidden in non-obvious menus. Here's what really works on the Mi 6:

• 🧹 Waste cleanup: Deletes temporary files, remnants of deleted applications and empty folders. → Cleanup.
• 🗑️ Deep Cleanup: Analyzes rarely used files and suggests removing them.Path: Security → Cleanup → Deep cleaning.
• 🔍 Search for large files: Shows files size >100MB. Included in Files → Categories → Large files.

The Mi 6 feature is that the system can leave up to 1-2 GB of “invisible” debris after cleaning. MIUI It does not remove the cache of some system processes (e.g., mediaserver) ADB-Teams (more on this below).

How to start a deep cleaning:

1. Open Security (Shield icon).


2. Slip the Cleaning → Deep Cleaning.




3. Select categories (e.g. Unused Files and Application Residues).




4.Push Clear and confirm.

Once a week.|Once a month|Only when the place ends.|Never clean.-->

4. ADB-How to remove what is not visible in the interface?

If standard methods don't work, it's time to connect to the Android debugging bridge (ADB), which will remove the system cache that MIUI doesn't show the user, for example, on Mi 6, you often have:

• Dalvik-cache cache (up to 500 MB)
• Temporary update files (/cache)
• Remnants of remote applications in /data/app-lib.

The work will require:

1. A computer with ADB Tools installed.
2. Included debugging on USB on your phone (Settings → About Phone → MIUI Version → 7 times tap → Back to Additional → For developers → Debugging on USB).
3. USB-cable (preferably original).

Cleaning commands (enter cmd or terminal):

adb shell


su




rm -rf /data/dalvik-cache/*




rm -rf /cache/*




exit




exit

⚠️ Attention: Rm teams -rf They delete data permanently. Don't do it for folders. /system or /vendor — This will lead to a brick (breakdown) of the phone.

5.Cache resetting in Recovery: a radical but effective method

If the phone is slowing down and the memory is clogged with invisible garbage, resetting the cache over the receptacles will help, a method that doesn't delete user data, but cleans:

• Cache applications and systems.
• Temporary update files.
• Remains from older versions of MIUI.

Instructions for Mi 6:

1. Turn off the phone.
2. Press Volume Up + Power before the Mi logo appears.
3. In the recovery menu, select Wipe & Reset → Wipe Cache (control – volume buttons, confirmation – power).
4. After cleaning, restart (Reboot → System).

This method is especially useful after major MIUI updates, when the system forgets to clean old files. For example, after upgrading from MIUI 12 to MIUI 14, the cache can take up to 3 GB.

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Resetting cache to recovery is the only way to remove debris that is not cleaned through standard MIUI settings, but it will not help if the memory is full of user files (photos, videos, applications).

Memory Optimization: How to Prevent Re-Filling?

Memory cleanup is a half-measure if you don't get the storage system right. Here are 5 rules for the Mi 6 that will prolong the life of the storage:

• 📲 Mi 6 does not support adoptable storage, but you can use the card as external storage for media files.
• ☁️ Automatic upload to the cloud: Configure Google Photos or Mi Cloud to automatically sync photos/video.
• 🚫 Cache Limitation: In Settings → For each messenger, set a cache limit (for example, 500 MB for Telegram).
• 🔄 Regular Cleaning: Start Security once a month → Cleanup → Deep cleaning.
• 📉 Controlling APK: Remove installers (.apk) after installing apps – they can weigh hundreds of megabytes.

For advanced users: you can disable caching for individual applications via ADB:

adb shell pm disable-user --user 0 com.android.providers.media

This command will disable the media scanner, which creates thumbnails for all photos/video (savings ~200-300 MB).

7.Extreme measures: reset to factory settings

If no method works and there is less than 10% free memory, then you have to reset hard, and that will delete everything, including:

• Installed applications and their data.
• Accounts (Google, Mi Account)
• System settings (Wi-Fi, wallpaper, sounds).

How to drop Mi 6:

1. Make a backup copy of important data (contacts, photos, messages).
2. Go to Settings → About the phone → Reset settings.
3. Choose Delete all data and confirm.
4. After restarting, set your phone as new.

⚠️ Attention: On Mi 6s MIUI 12+ After the reset, you may need to link to the Xiaomi account that was on the phone before the cleanup. If you forget your account details, the phone will become a brick»!

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Factory reset is the last chance to bring the Mi 6 back to life if the memory is 90%+, but after this procedure, the phone will be like new: no apps, no settings, but with full free memory.

FAQ: Frequent questions about cleaning the memory Xiaomi Mi 6