Xiaomi Phone Data Files: What It Is, Where It Is, and How to Manage It

Xiaomi smartphones based on MIUI or HyperOS store hundreds of thousands of files, from system configurations to user photos. But what exactly is hidden under the term "data files"? Why they take up gigabytes of memory, and can they be safely deleted? This article will examine the types of files, their location in the Xiaomi file system, and also explain how to distinguish critical data from garbage that can be cleaned without risk to the device.

Many users are faced with a situation where the memory of the phone suddenly runs out, although there are no obvious “heavy” applications, the reason for this is often cached files, logs of system processes or residual data from remote programs. In this article, we will not only classify data files, but also show how to analyze them using embedded MIUI tools and third-party utilities — from File Manager to ADB. Particular attention will be paid to hidden folders that are usually ignored, but which can weigh tens of gigabytes.

What are data files in a Xiaomi smartphone

The term “data files” in the context of Xiaomi refers to any files that are not executable programs (.apk) or system libraries (.so,.odex).

• 📱 User data: photos (.jpg,.png), video (.mp4), documents (.pdf,.docx), music (.mp3,.FLACKS stored in folders /storage/emulated/0/ (internal memory or SD-map.
• ⚙️ System data: configuration files (.xml,.conf), application databases (.db), cache (/data/data/), mistake (/data/log/). Available only with root rights or through ADB.
• 🗑️ Temporary and cached files: residues from installed applications (/data/app-lib/), Google Play Services cache, image thumbnails (.thumbnail) often taken up by the 30% memory.

It is important to understand that even after deleting the application, its data may remain in folders. /data/data/[package_name]/ or /sdcard/Android/data/[package_name]/. For example, Telegram stores a cache of media files in /sdcard/Android/media/org.telegram.messenger/, a WhatsApp, in /sdcard/WhatsApp/Media/. These files are not automatically deleted when the program is uninstalled.

In Xiaomi’s HyperOS smartphones, app cache files can take up to 5-7 GB even when regularly cleaned through the Storage menu, which is due to the peculiarities of the F2FS virtual file system, which is used instead of the traditional ext4.

Where data files are stored in Xiaomi: folder structure

Xiaomi file system follows the Android standard, but with features related to firmware MIUI/HyperOS. Main directories where data is stored:

To access hidden folders (e.g. /data/), root or ADB commands are required. For example, to view a list of large files in /data/data/, you can use:

adb shell


su




du -ah /data/data/ | sort -rh | head -n 20

Without root, you can only analyze folders in the /storage/emulated/0/ (internal memory; and SD-It's a lot of stuff:

• 📁 folder Download/ — downloaded files from the browser or messengers.
• 📁 folder MIUI/ — backups of the system, theme and wallpaper (may weigh up to 1–2 GB).
• 📁 folder Android/data/ — cache of games and applications (for example, PUBG Mobile or TikTok).

How to Check Which Files Take the Most Space

MIUI and HyperOS have built-in tools for analyzing storage, but they don't always show the full picture.

1. Through the Storage menu: Go to Settings → Storage. The system will show the allocation of memory into categories: Applications, Images, Video, etc. Click on the category to see large files.
2. File Manager: Open the standard File Manager, go to Storage Analysis. This shows folders sorted by size. Android/data/ and MIUI/.
3. With ADB (for advanced): Connect your phone to your PC and run a command to search for files >100 MB: adb shell find /storage/emulated/0/ -type f -size +100M -exec ls -lh {} \;

Third-party apps like Files by Google or SD Maid can also help you find junk, such as SD Maid, which can detect:

• 🗑️ Residual files of remote applications (.apk,.obb).
• 📂 Empty folders (for example, after transferring files).
• 🔄 Duplicate photos (often occur when backing up).

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If the storage menu shows occupied space, but the files are not visible, check the folder /storage/emulated/0/.trashes/. This stores files sent to the Recycle Bin via File Manager, and they can take up gigabytes.

Which files can be safely deleted and which can not

Memory cleaning is always a balance between freeing up space and risking damage to the system.

What can be removed without risk:

• 🧹 folder /storage/emulated/0/.thumbnails/ — Image miniatures (restore automatically).
• 🗑️ folder /storage/emulated/0/MIUI/backup/AllBackup/ — backups.
• 🎮 folder /Android/obb/ — If the games are deleted and the files are left.

What can't be touched:

• ⚠️ folder /data/dalvik-cache/ — cache of the Android virtual machine (deletion will lead to failures).
• ⚠️ Files in /data/system/ — System configuration (e.g. gesture.key for unlocking).
• ⚠️ folder /efs/ — contain IMEI Serial numbers (damage will make the phone a brick»).

How to Recover Accidentally Deleted Files

If you delete important data (photos, documents, contacts), you can try to recover it, the methods depend on the type of files and whether it was used. SD-map:

1. For internal memory: Use programs like DiskDigger or Recuva (root required). Important: don't write new files to your phone after you delete it, it reduces the chances of recovery. Xiaomi with HyperOS is good for MIUI Backup (if backup function was enabled in Settings → About Phone → Backup).
2. For SD-Maps: Connect the map to your PC and use PhotoRec or EaseUS Data Recovery. These utilities scan sector by sector and recover even highly fragmented files.
3. For contacts and messages: If sync with Google or Mi Account was enabled, data can be restored through Settings → Accounts → Google → Sync.

Important: Recovery only works until the first data rewriting, for example, if you delete a photo and then make a new one, the chances of returning the old one drop dramatically.

Hidden Data Files: What They Are and Can They Be Deleted?

In Xiaomi, many files are hidden from the user by default, starting from a dot (e.g.,.nomedia,.data) and not displayed in a standard Explorer.

1. Open File Manager.
2. Click on the three dots in the top right corner → Settings → turn on Show Hidden Files.

Common hidden files and folders:

• 📁.nomedia – tells the system to ignore the folder when scanning media files (for example, for a WhatsApp cache).
• 📁.Data – may contain temporary application files.
• 📁.trashes – File Manager basket (see above).
• 📁.android_secure — encrypted data of some applications.

Most hidden files can be deleted, but there are exceptions:

⚠️ Note: Do not delete files.android_secure manually, which can cause encryption applications (such as banking programs) to crash. /data/system/, Even if the files seem unnecessary.

How to Prevent Memory Crackdown in the Future

To ensure that data files do not take up excess space, follow these recommendations:

• 🔄 Automatic Cache Cleanup: Enable in Settings → Warehouse → Clean up the option "Autoclean" system will delete unnecessary files once a week.
• ☁️ Cloud storage: Set up automatic photo uploads in Google Photos or Mi Cloud (Gallery menu) → Settings → Backup).
• 📱 Restricting cache for applications: C Settings → Annexes → [select] → Storage can be restricted to cache (for example, for TikTok or Instagram).
• 🗃️ Regular audit: Check folders once a month Download/, DCIM/ and Android/data/ file-in-the-box.

For advanced users, it's useful to set up a Tasker or MacroDroid to automatically clean the cache on a schedule, for example, you can create a rule:

If:


- Time: 3:00 (night)




- Battery charge: >50%




Then:




- Execute the command: pm clear com.android.providers.media (cleaning the media cache)




Delete files older than 30 days in /storage/emulated/0/Download/

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The biggest source of garbage in Xiaomi is the cache of social networks and instant messengers, for example, Telegram can take up to 5-10 GB per media files, even if you did not save them explicitly.

FAQ: Frequent questions about data files in Xiaomi