Cleaning up Xiaomi Redmi 4’s internal memory: a complete guide with proven methods

Xiaomi Redmi 4 is one of the most popular budget smartphones, but its 16 or 32 GB of internal memory is quickly clogged with garbage. Even after removing applications, space mysteriously disappears? This is not a coincidence, but a feature of MIUI and Android. In this article, we will analyze 7 proven ways to clean memory without risk to data, from basic to advanced, including hidden system functions.

The memory problem on Redmi 4 is compounded by the fact that the model does not support adoptable storage memory cards, so every megabyte counts. We will not recommend the banal “remove unnecessary photos” – we will focus on system debris, cache, duplicates and optimizations, which are not written in the standard instructions.

Why the memory on Redmi 4 is filling up on its own

Even if you don't install new apps, Redmi 4 memory can melt away.

• 🗑️ App caches are temporary files that should be cleaned automatically, but often remain in place for years, especially messengers (WhatsApp, Telegram) and social networks.
• 📁 System Logs and Dumps – Error Report Files (/data/tombstones, /data/anr), which MIUI Do not remove without manual intervention.
• 🔄 Residual files after deleting programs - folders in /data/data and /sdcard/Android/data often remain intact.
• 📱 Updates MIUI, which are in the background and are in the 2 GB (daddy) /cache).

Another feature of Redmi 4 is memory fragmentation, where using cheap eMMC (rather than UFS) memory slows down over time, and the system starts to "glut" even at 20 percent of the free space, and not only will the cleanup free up gigabytes, but it will also bring back the smoothness of the interface.

Method 1: Built-in MIUI cleaning – what it really removes

The most obvious method is to use the built-in Safety → Cleanup tool, but few know that it doesn't clean everything.

• ✅ Application cache – temporary files that can be safely erased.
• ✅ Unused. APK — balances after updating programmes.
• ❌ DOESN'T remove: 📂 Download folder with downloads. 🎵 Music and podcasts from Mi Music. 📸 Photos of miniatures (.thumbnail). 📦 Backup copies MIUI Backup.

To start the cleanup:

1. Open Settings → Security → Cleaning.
2. Click Scan and wait for analysis.
3. Select the categories to delete (we recommend ticking everything except “Large Files” – it is better to check them manually).
4. Put it on the clean.

An important nuance: once the cache is cleared, some apps (like Google Maps or Instagram) will load longer on the first run — that's normal. The cache will recover automatically.

Method 2: Manually cleansing the cache for individual applications

Not all apps are equally useful, for example, Facebook cache can take up to 1 GB, and Google Play Services can take up to 500 MB.

1. Go to Settings → Applications → Application Management.
2. Select the app (start with the “heaviest” ones – their weight is displayed in the list).
3. Slip the vault. → Clear the cache.
4. To completely reset (if the application is buggy), click Clear Data, but note: this will delete all settings and accounts inside the program.

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If the app is slower after cleaning the cache, try reinstalling it. Sometimes the cache contains performance-critical data.

Method 3: Removing System Garbage Through Engineering Mode

The Hidden Engineering Mode allows you to delete files that are not visible through standard settings, a technique that requires caution but can free up to 1-2 GB on a littered device.

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. Select Storage Information (or Storage).
3. Scroll down to the Cache section and click Clear Cache.
4. Go back to the main menu and select Usage Statistics → Clear App Data.

This menu also includes:

• 📊 View detailed statistics on memory usage by category.
• 🗃️ Delete Dalvik Cache (Android Virtual Machine cache), which will speed up the system.
• 🔍 Find and delete empty folders that remain after uninstallation of programs.

⚠️ Note: Do not delete files in System or Boot partitions – this can cause a device to fail. Engineering Mode gives access to low-level settings, so proceed carefully.

Method 4: Clean Cache and Data folder manually through file manager

Even after using all the built-in tools, the system still has invisible files, and to delete them, you will need a root file manager (such as Root Explorer) or a standard Mi File Manager with hidden folders enabled.

What folders can be cleaned:

• 📁 /cache — Temporary system files (you can delete all contents).
• 📁 /data/local/tmp — installer-file.
• 📁 /data/log — system logs (files with.log or.txt extension).
• 📁 /sdcard/Android/obb — Game cache (.obb files can be deleted if games are not used).

How to enable hidden files in Mi File Manager:

1. Open the app and tap on three dots in the upper right corner.
2. Select Settings → Additionally.
3. Activate the option to show hidden files.

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Do not delete files in /system, /efs or /persist folders – this may disrupt the communication module or IMEI.

Method 5: Optimize memory through ADB (for advanced)

If previous methods didn’t work, you can use Android Debug Bridge (ADB), a low-level device management tool that requires a PC connection, but allows you to remove debris that is not available through the interface.

What can be done through ADB:

• 🧹 Clear the cache of all applications with one command: adb shell pm trim-caches -f 100
• 🗑️ Remove unnecessary APK-Packages (e.g. pre-installed games): adb shell pm uninstall -k --user 0 com.example.app
• 📊 Detailed Memory Use Report: Adb shell dumpsys meminfo

Step-by-step:

1. Download ADB Tools and unpack it on PC.
2. On your phone, turn on Settings → About Phone → MIUI version (tap 7 times to activate Developer Mode).
3. Return to Settings → Additional → For developers and enable USB debugging.
4. Connect Redmi 4 to your PC and in the command line (in the folder with ADB) execute: adb devices (your device should appear).
5. Enter the cleaning commands (see above).

⚠️ Note: Removing system applications through ADB may disrupt MIUI. Before executing commands, check if the package is critical (for example, com.miui.home is a launcher, its removal will make the phone inoperable).

Method 6: Transfer data to a memory card (with limitations)

Redmi 4 supports microSD cards up to 256 GB, but with an important caveat: not all data can be transferred. Unlike the new Xiaomi models, there is no Adoptable Storage feature here, so the card will only be used for:

• 📸 Photo and video (via camera settings).
• 🎵 Music and podcasts.
• 📄 Documents (PDF, Word, Excel).
• 🎮 Some games (if they support transferring to the SD).

How to set up the save on the map:

1. Insert the microSD into the slot (on Redmi 4 it is hybrid - either a second SIM or a memory card).
2. Open the Settings → Storage → Memory Map.
3. Choose Format as internal memory (Warning: This will remove all data from the card!).
4. In the camera settings (Camera Settings → Storage), select Memory Map.

Limitations:

• ❌ Applications are installed by default in internal memory.
• ❌ Some games, for example, PUBG Mobile or Call of Duty is not working with a card.
• ❌ Read/write speeds on microSD are lower than on-board memory (especially on cheap cards).

Method 7: Reset to factory settings – when justified

If all the previous methods didn't work, then you're left with a hard reset, which is a complete factory reset, which is a radical way to do this, but it's guaranteed to clean up all the memory, including:

• 📱 All installed applications and their data.
• 📂 System settings and accounts.
• 📸 Photos, videos and music (if not on a memory card).
• 📧 Emails, messages and contacts (unless synced with Google).

How to do the reset correctly:

1. Save important data on your PC or in the cloud (Mi Cloud, Google Drive).
2. Open Settings → Additional → Recovery and Reset.
3. Select Settings Reset. → Erase everything.
4. Confirm the action (a password may be required).
5. After restarting, perform the initial setting as when you first turn on.

If the phone is not turned on or stuck on the logo, you can reset through Recovery Mode:

1. Turn off Redmi 4.
2. Press Volume Up + Power before the Mi logo appears.
3. In the recovery menu, select Wipe Data → Wipe All Data (manage volume buttons, confirmation – power button).
4. After cleaning, select Reboot.

⚠️ Warning: On Redmi 4 with unlocked bootloader, a reset via recovery could result in loss TWRP (If it has been installed, then the reboot will require a re-firmware.

FAQ: Frequent questions about cleaning Redmi memory 4