How to check memory on Xiaomi Redmi Note 9: internal and operational

Xiaomi Redmi Note 9

MIUI

What is the state of memory?

RAM

ROM

In this article, you will find 5 proven ways to test memory on the Redmi Note 9 — from standard MIUI tools to hidden features and third-party utilities. We will also analyze which data is safe to delete and which should not be touched so as not to disrupt the system. If your smartphone is slower, often “hangs” or gives a notification “Memory is full” — this guide will help to understand the reasons.

The peculiarity of the Redmi Note 9 is that it was released in several versions with different memory capacity: 3/32 GB, 4/64 GB and 4/128 GB. Even if you have a top version, over time, free space is reduced due to updates, app cache and media files. RAM (3 to 4 GB) can also become a bottleneck if you run too many processes.

Before you start cleaning, prioritize:

• 📱 Internal memory is full? → You need to find and delete unnecessary files.
• 🔄 RAM is overloaded? → It is worth closing background applications or optimizing autoload.
• ⚠️ The system makes mistakes? → The file system may be damaged or a reset is required.

Next are detailed instructions for each case.

1. Memory check through standard MIUI settings

The easiest way is to use the built-in MIUI tools, which provide basic information about memory status, but often enough for initial diagnosis.

To view the total volume and free space of internal memory:

1. Open the settings (cog icon).
2. Go to the About Phone section.
3. Select Warehouse (or Memory in some firmware versions).

Here you will see a diagram of the distribution of memory by category: applications, photos, video, audio, cache, etc. Click on any category to see a detailed list of files. For example, in the Applications section, you can sort programs by size and see which ones take up the most space.

To check the RAM (RAM):

1. In the same settings go to About phone → Memory.
2. Click on Use of RAM (or RAM).

The system will show how much memory is currently occupied, as well as a list of active processes, and you can manually close unnecessary applications by clicking Clear.

Note that if RAM is less than 500 MB free, the smartphone can start to slow down, in which case restarting or optimizing the auto-start of applications will help.

2 Detailed Memory Analysis Through "Security"

MIUI has a hidden tool for deep memory analysis, the Security app (or Security in global versions), which not only shows occupied space, but also offers optimization of the system.

How to open a detailed report:

1. Launch the Security app (shield icon).
2. Go to the Optimization (or Boost) tab.
3. Press Deep Cleanse → Memory.

Here you'll see:

• 📊 Total volume and free space on the internal drive.
• 🗑️ Garbage files (cache, temporary data, remnants of deleted applications).
• 📁 Large files (video, archives, installers) APK).
• 🔍 Duplicates (repeated photographs or documents).

The advantage of this method is that the system automatically finds files that can be safely deleted, such as app cache or old ones. APK-However, be careful with the category Other files - there may be stored important data.

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If you see unknown archives or APKs in the Large Files section, check them with antivirus before you delete them. These may be malware residues.

To analyze RAM in the same appendix Security:

1. Go to the Optimization tab.
2. Press RAM (or Memory)
3. The system will show a list of running processes and suggest closing unnecessary ones.

Important: If you see unknown services with strange names (e.g., combinations of letters and numbers) in the process list, it could be a sign of a virus.

3.Using the MIUI file manager

The integrated File Manager (or Files) in Redmi Note 9 not only allows you to view files, but also analyze what exactly takes up space on the device, which is useful if you want to manually find and delete unnecessary data.

Instructions:

1. Open the File Manager (Folder Icon).
2. In the bottom menu, select Storage Analysis (or Storage Analysis).
3. Wait for the scan to be completed (it may take 1-2 minutes).

After the analysis, you will get an interactive chart broken down by category:

• 📷 Images (photos, screenshots, pictures from messengers).
• 🎥 Videos (camera-recorded videos or downloaded from the Internet).
• 🎵 Audio (music, podcasts, voice messages).
• 📄 Documents (PDF, Word, Excel, texts).
• 📦 APK and installers (remains from application installation).

Click on any category to see a file list sorted by size. For example, in the Video section, you can find forgotten videos that take up several gigabytes.

Advice: Pay special attention to folders:

• DCIM – photos and video from the camera.
• Downloads – downloaded files (often unnecessary APKs accumulate here).
• Android/data – cache and application data (can only be deleted through root access).

If you use a microSD card, the file manager will show you the contents of the card, but keep in mind that some apps (such as WhatsApp or Telegram) default to store media files in internal memory.

4. Memory check through Developer Mode and ADB

For advanced users who want to get the most accurate information about the state of memory, the method will be suitable through the developer mode and the ADB utility. This will allow you to see not only free space, but also detailed statistics on the use of RAM and ROM.

Step 1: Enable the Developer Mode:

1. Go to Settings. → The phone.
2. Click 7 times in a row on the MIUI version (you will be notified “You became a developer”).
3. Back to Settings → Additionally. → For developers.

Step 2. Check out the memory statistics:

• 📱 Internal Memory: In the For Developers section, look for Memory. RAM and ROM real-time.
• 🔧 ADB-Commands: connect your phone to your PC and use the commands: adb shell df -h # Shows free space on the sections adb shell dumpsys meminfo # Detailed statistics of RAM

Example of output of the command df -h:

Warning: ADB commands require you to connect to your computer and install drivers. Incorrect use can cause system failures. If you are not sure about your actions, you should use other methods.

5. Third-party applications for memory analysis

If standard MIUI tools aren't enough, you can use third-party tools that offer more flexible settings and data visualization.

Top.-3 apps for Redmi Note 9:

How to use Files by Google:

1. Install an app from the Play Market.
2. Open it and press Cleanup.
3. Select file categories for analysis (cache, duplicates, downloads).
4. Click Clear to delete unnecessary data.

⚠️ Attention: Some applications (e.g, SD Maids require root access for deep cleaning, without which they will only show surface information. Remember, getting root rights voids the warranty and can lead to unstable system operation.

If you use a memory card, third-party apps can help you transfer heavy files (such as videos or music) to it. → Move it → point the way SD-map.

6 What to do if the memory is full and cleaning does not help

Sometimes even after you delete the files you don't need, the system keeps showing that the memory is full, and this can happen for a number of reasons:

Possible problems and solutions:

• 🔄 System cache: even after cleaning, it can recover. Try restarting your phone in Safe Mode (press the power button). → Restart in Safe Mode and Repeat Cleaning.
• 📦 Hidden files: Some applications (such as messengers) store data in hidden folders. Use a file manager with the option to show hidden files (such as Solid Explorer).
• 🛠️ Faulty file system: If the file is not freed up after deleting the file, the partition table may be damaged, and factory resets will help (but remember to backup!).
• 📱 Mistake in MIUI: Sometimes the firmware doesn't display the free space correctly. ADB or re-flash the device.

⚠️ Attention: if after resetting the problem persists, it may indicate a hardware malfunction (for example, failure of flash memory).In this case, contact the service center.

Extreme measures:

• 📥 Fastboot Firmware: If the bug is software, clean installation will help MIUI.

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If after all the manipulations, the memory still “disappears”, check the device for viruses – some Trojans create hidden files that take up gigabytes.

FAQ: Frequent questions about memory on Redmi Note 9