Xiaomi Mi 9 Lite Memory Cleanup: From Cache to Deep Optimization

Xiaomi Mi 9 Lite (codenamed pyxis) even with 128 GB of internal memory sooner or later begins to “suffocate” from the accumulated garbage. High-resolution photos, app updates, game cache and system files eat precious gigabytes, and MIUI does not always effectively manage storage. If your device began to slow down, issue notifications about space shortages or refuse to install new programs, it’s time to act.

In this article, we will discuss 7 proven ways to clean up memory, from basic (cache removal) to radical (factory reset), taking into account the features of the Mi 9 Lite. You will learn which files can be safely deleted and which should not be touched, how to transfer data to a memory card (if installed), and why the standard Cleaner in MIUI does not always cope with the task. For convenience, we have compiled a comparative table of methods on efficiency and risks.

1. Analysis of occupied space: what eats up memory?

Before you clean, you need to understand what exactly takes up space. The Mi 9 Lite has built-in tools and third-party utilities for this.

1. Go to Settings → About the phone → Memory.
2. Wait for the scan to be completed (it can take up to 1 minute).
3. Click on the category (such as “Apps” or “Media Files”) for detail.

Typical memory eaters on the Mi 9 Lite:

• 📸 Photo and video: smartphone camera (48 MP) + 8 MP + 2 MP) creates files weighing 5-15 MB each, and when you shoot actively, you accumulate 10 MB per month.+ GB.
• 🎮 Games: Genshin Impact or Call of Duty Mobile take 3-8 GB to install, plus cache.
• 🗑️ Facebook, Instagram and Telegram can accumulate up to 1-2 GB of temporary data.
• 📁 System files: updates MIUI, Log files and backups weigh hundreds of megabytes.

For a deeper analysis, use third-party utilities:

• Files by Google (free, shows "junk" and duplicates).
• SD Maid (paid, clears system cache and residual files).

⚠️ Note: Do not manually delete Android folders, MIUI or DCIM/.thumbnails It can be a file manager, and it can disrupt the system.

2.Cleaning App Cache: A Quick Way to Free 1–3 GB

Cache speeds up the software, but it swells up to a giant size over time, and on the Mi 9 Lite, you can clean it in two ways:

Method 1: Manual cleaning for individual applications

1. Open Settings → Applications → Application Management.
2. Select a program (such as YouTube or Chrome).
3. Press Warehouse. → Clear the cache.

Method 2: Mass cleaning with MIUI Optimizer

1. Launch the Security app (shield icon).
2. Go to the Cleanup tab.
3. Press Deep Cleanup and confirm the action.

Efficiency of the method:

• ✅ Releases 1-3 GB (depends on the number of installed applications).
• ⚠️ Does not delete personal data (photos, messages), only temporary files.
• ❌ Cache will start to accumulate again after 1-2 weeks of active use.

Close all background applications | Connect your phone to charge (if charge < 20%) | Make a backup of important data | Check the free space before and after cleaning-->

3. Delete unnecessary files and duplicates

Photos in multiple copies, downloaded memes, old APK-Files, all of this takes up space. The Mi 9 Lite has built-in and third-party tools for finding garbage.

Built-in MIUI tools

1. Open Files → Categories → Multimedia.
2. Select Duplicates or Large Files.
3. Mark unnecessary files and click Delete.

Third-party applications for deep cleaning

• 🔍 Files by Google: Finds duplicates that are not used APK and temporary files.
• 🧹 CCleaner: Clears cache, call history and SMS (gently!).
• 📂 DiskUsage: visualizes occupied space by folders.

Pay special attention to the folders:

• Download – downloaded files from the browser.
• Pictures/Screenshots – screenshots (can weigh hundreds of megabytes)
• Android/obb – game data (you can only delete the game if you delete it).

⚠️ Attention: Folder Android/data It contains game and application settings, and only delete content if you're willing to lose progress in games or program settings.

4. Transfer of data to memory card (if installed)

Xiaomi Mi 9 Lite supports microSD cards up to 256 GB, but not all data can be transferred.

• 📷 Photos and videos: through the Gallery app (select files) → More. → Move it).
• 🎵 Music and podcast: manually via file manager.
• 📄 Documents: PDF, Word, Excel (not system files!).

What can't be transferred to SD-map:

• 🚫 Annexes (MIUI Does not support Adoptable Storage).
• 🚫 Game data (save, cache) Android/obb).
• 🚫 System files and updates MIUI.

Instructions for transferring media files:

1. Open Files → Categories → Images (or another category).
2. Select files, press More → Move.
3. Choose. SD-map and confirm.

💡

If you often shoot videos in 4K On the Mi 9 Lite, set up automatic saving on the SD-Map in the Camera app (Settings) → Preservation site).

5. System debris removal and MIUI updates

MIUI leaves behind temporary files, old updates and logs that can be safely deleted.

Cleaning Download folder from old APKs

When updating apps through Google Play or MIUI App Store APK-The files are left in the Download folder:

1. Open Files → Downloads.
2. Sort by size (more → sorting → by size).
3. Delete files with the.apk extension (if they are not needed for manual installation).

Removing old MIUI updates

After installing the firmware, update files remain in the /cache folder and can take up to 1-2 GB:

1. Connect your phone to your PC and enable USB Debugging (Settings → About Phone → MIUI Version → 7 times press to unlock the developer options).
2. Use an ADB or root-enabled file manager (such as Root Explorer) to clean the /cache folder.

adb shell su -c "rm -rf /cache/*"

Cleaning up log files

MIUI keeps logs of errors that grow over time to remove them.

1. Install SD Maid (root rights required)
2. Run the scan in the CorpseFinder section.
3. Delete files with.log,.tmp extensions.

⚠️ Note: Do not manually delete files from folders /system or /vendor — This will lead to the collapse of the system and the need for flashing.

6.Reset to factory settings: a last resort

If none of the methods worked and the Mi 9 Lite has less than 10% of the available space, you'll have to do a hard reset, which will delete all the data, including:

• 📱 Applications and their settings.
• 📇 Contacts (unless synced with Google or Mi Account).
• 📸 Photos, videos and music (unless transferred to the SD PC).
• 🔑 Wi-Fi and Bluetooth devices passwords.

Resetting instructions:

1. Make a backup through Settings → Additional → Backup and Reset.
2. Go to Settings → About the phone → Reset settings.
3. Choose to erase all data and confirm.
4. After restarting, perform the initial setup.

On the Mi 9 Lite, the reset takes 5-10 minutes, but after it the system works much faster - this is due to the cleaning of fragmented data and the reset of background processes.

💡

Factory reset is the only way to completely remove system debris, but requires a full backup of data. Use it if other methods have failed.

7. Comparison of cleaning methods: what to choose?

Not all methods are equally effective. Below is a table comparing key parameters:

Selection recommendations:

• 🔹 If you need to quickly release 1-2 GB → cache-cleaning.
• 🔹 If the memory is full of photos/video → transference SD cloud.
• 🔹 If the smartphone is severely slowed down → reset.
• 🔹 If nothing helps. → Check for viruses (Malwarebytes) or memory malfunction.

FAQ: Frequent questions about cleaning up memory