Sysdump on Xiaomi: how to clear cache and free gigabytes of memory

What is sysdump on Xiaomi and why does it rank?

If you've ever looked into the storage of your Xiaomi smartphone through a file manager, you've noticed a mysterious folder called sysdump, which takes anywhere from a few hundred megabytes to a few gigabytes. It's not a virus or a system bug, it's a service directory that is created automatically when your firmware or applications fail, and it records error logs, memory dumps, and other diagnostic information that Xiaomi engineers can use to analyze problems.

The problem is that these files are never automatically deleted, even after a system update or reset. Over time, the folder grows, taking up precious space on the internal drive. This is especially noticeable on budget models of Redmi or POCO with 32-64 GB of memory, where every gigabyte counts. But even on flagships like Xiaomi 14 Ultra or Black Shark 6 sysdump can reach 5-10 GB if you do not clean the cache for a long time.

It's important to understand that it's not always safe to delete all the contents of the sysdump folder just like that. Some files can be blocked by the system, and forced deletion without the correct access rights can lead to a cyclical reboot or even a "brick" of the device, so before cleaning, you need to know which files you can touch and which are better left.

How to check how much space sysdump takes up on your Xiaomi

Before you start cleaning, make sure that the problem is really in the sysdump folder.

1. Open the "Settings" → About the phone → Storage.
2. Scroll down to the Other Files or System Data section.
3. If it contains 1–5 GB (or more) of unidentified data, it’s likely sysdump.

A more accurate way is to use a root file manager or a built-in MIUI File Manager:

• 📁 Open the internal memory → MIUI → debug_log or directly sysdump (depending on the firmware version).
• 📊 See the folder size in properties (long press). → Properties).
• 🔍 Note files with.log,.dmp or.tar extensions – they take up the lion’s share of space.

Can I just delete the sysdump folder manually?

Technically, yes, but there are consequences: the sysdump folder is protected by system permissions, and its contents can be blocked even for a root user. If you try to delete files through a standard file manager, you will likely see a "No access" or "File used" error.

Moreover, some logs in sysdump can be tied to running processes, and forced deletion can cause:

• ⚠️ Interface freeze (especially if you delete files while the system is running).
• ⚠️ Data loss in background applications (for example, unsaved messages in Telegram or WhatsApp).
• ⚠️ Cyclical reboot if you delete the critical kernel logs.

⚠️ Attention: On devices with MIUI 14+ The sysdump folder can be hidden even from file managers with root access. ADB or TWRP without proper commands may trigger anti-tampering protection.

So what do we do? There are three safe ways to clean up, which we'll look at below.

Method 1: Clean sysdump through an engineering menu (no root)

The most reliable method is to use Xiaomi’s hidden engineering menu, which is available on most devices without the need for root permissions, which works on MIUI 12-14 and HyperOS, but may vary depending on the model.

Instructions:

1. Open the Phone app and type in the combination: ##4636## If the code didn't work, try the alternative: ##284###
2. In the menu that opens, select Storage Information (or Storage).
3. Scroll down and find the Clear SysDump or Clean system dumps option.
4. Confirm the action and restart the device.

If there is no such item, try another way:

• 🔧 Go to Settings. → The phone. → Press 5-7 times on the version MIUI, activate the developer mode.
• 🔧 Back to Settings → Additionally. → For developers.
• 🔧 Find the option to clean the system logs (can be called SysDump Cleanup).

If the engineering menu is not available, move on to the next method.

Method 2: Remove via ADB (for advanced users)

If the engineering menu didn’t work, you can use Android Debug Bridge (ADB) — A debugging tool that allows you to control the file system through a computer. USB installation ADB-PC-driver.

Step-by-step:

1. Download and install Google’s Platform Tools.
2. Turn on your phone: Settings → About Phone → MIUI Version (Tap 7 times) Settings → Additional → For Developers → Debugging by USB
3. Connect your phone to your PC and type in the command line: adb shell su rm -rf /data/vendor/sysdump/* rm -rf /data/log/* exit exit exit

If the SU command is not working (no root), use an alternative route:

adb shell pm clear com.miui.debug

⚠️ Note: Some HyperOS firmware rm commands -rf In this case, try: adb shell cd /data/vendor/sysdump ls -la | grep -v "^d" | awk '{print $9}' | xargs rm -f This will only delete files, avoiding directories.

After cleaning, restart the device and check the vacant space.

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If ADB doesn’t see the device, try changing USB connection mode to File Transfer (MTP) or installing drivers manually through the Mi Flash Tool.

Method 3: Manual cleaning via TWRP (unlocked bootloader required)

If you have custom recovery TWRP installed, you can remove sysdump directly from it, a method that is suitable for users who have already unlocked the bootloader and have experience with firmware.

Instructions:

1. Boot to TWRP (Put Power + Volume Up when the phone is off).
2. Go to Advanced → File Manager.
3. Find folders: /data/vendor/sysdump/data/log
4. Select all files inside (except folders) and select Delete.
5. Reboot to the system.

If none of these methods work, the last option is to reset to factory settings, but that's the last resort, because you're going to lose all the data.

Why sysdump reappears and how to prevent it

Even after cleaning, the sysdump folder can grow back, because:

• 🐞 Frequent app crashes (especially if you are using beta versions of firmware or modified ones) APK).
• 🔄 Unstable updates (for example, after switching to HyperOS, many users complain about the increased size of logs).
• 📱 Active use of debugging functions (included debugging by USB or the error log in the developer settings).

To minimize the growth of sysdump:

1. Disable unnecessary options in the developer menu: Settings → Additional → Developers → Disable: - MIUI Error Log - USB Debugging (if not using) - Logistics HID operations
2. Clean the system application cache regularly: Settings → Applications → Application management → Three points → Show system → Find “MIUI Logs” and clear the data
3. Use utilities like SD Maid or Files by Google to automatically clean up unnecessary files.

If sysdump grows too fast (over 500MB per week), this may indicate hardware problems, such as a malfunction of RAM or a processor error, in which case it is recommended to conduct a diagnosis in the service center.

FAQ: Frequent questions about sysdump on Xiaomi

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Cleaning sysdump regularly is a good practice, but it's not a panacea. If the folder grows too fast, it's a signal that the system is unstable, and then you'd better check your phone for viruses or contact the service.