How to watch memory on the phone Xiaomi Redmi 9: internal, operational and cache

Xiaomi Redmi 9 is still a popular choice among budget devices, but over time, even 64 or 128 GB of internal memory begins to run out. And if the phone also “brakes”, the first thought is not enough RAM or clogged internal. But how exactly to know how much memory is free and how much is occupied by garbage? In this article, we will analyze all the methods of verification, from standard settings to hidden MIUI tools.

It’s important to understand the difference between memory types: Internal (ROM) stores your files and applications, RAM is responsible for multitasking, and cache is temporary data that can be safely cleaned. On Redmi 9 (M2003J15SC/M2004C3LG models), these parameters are tested differently, and we’ll show you how to do this without and with third-party programs in case the system tools suddenly stop working.

1. Standard method: through MIUI settings

The easiest method is to use the built-in MIUI tools. It does not require superuser rights and works on any firmware version (including MIUI 12/13/14 for Redmi 9).

1. Open the Settings app (the gear icon on the desktop).
2. Scroll down and select About Phone.
3. Slip on the Memory line (or Storage in new versions).

Here you'll see:

• 📊 Total internal memory (e.g. 64 GB or 128 GB).
• 📉 Occupied space (including system files, applications, and media).
• 🗑️ App cache – it can be cleared right here by clicking Clear.

The remaining space (less than 10% is critical!)

Cache volume (if >1 GB - it's time to clean)

The other section (there is often a garbage hiding place)

List of applications occupying the most space-->

Note the Other section, which often accumulates unnecessary files (logs, temporary data, remnants of deleted applications). If this partition takes up more than 2-3 GB, you should use cleaning utilities (we will discuss them below).

⚠️ Attention: In some firmware MIUI For Redmi 9, Memory may not be in About Phone, but directly in the main Settings menu (Memory and Digital Well-being). If you do not find it, search by settings (the magnifier in the upper right corner).

2.Ram Memory Check (RAM)

The RAM on Redmi 9 (3/4 GB depending on the modification) is responsible for the speed of the system. If it is not enough, the phone begins to “hang” when switching between applications.

1. Press your finger on the recent apps button (square at the bottom of the screen) and hold for 1-2 seconds.
2. At the top of the screen, a graphic will appear that says Memory Use and numbers (e.g., 2.7GB/3.5GB).

Alternatively:

• 🔧 Go to Settings. → The phone. → Status of the system.
• 📊 Slip a few times on the line version MIUI, Until the developer menu comes out.
• 🔄 Go back to the main Settings menu, find a new section for developers.
• 📈 Here will be the item Average use of RAM with detailed statistics.

Normal RAM use on Redmi 9:

⚠️ Note: If RAM is constantly loaded to 90%+, But the phone is stable, it's not always a problem. MIUI aggressively caches frequently used applications so they open faster. RAM manually (via "boosters") not recommended - this can impair performance.

Once a day.

Only when the phone is slowing down.

Never clean.

I don't know how to do that.-->

Hidden Tools: Engineering Menu and Codes

For advanced users, there are ways to get more detailed memory information through hidden menus. These methods work on all Redmi 9s, but require caution - don't change settings unless you're sure of their purpose!

Method 1: Engineering menu (#4636##)

1. Open the Phone app and enter the combination ##4636##.
2. Select the item Phone Information.
3. Scroll down to the Memory block, and you'll find detailed statistics on RAM and internal storage.

Method 2: Memory test (#6484##)

• 📱 Enter the phone application ##6484##.
• 🔍 Select Memory Test (Memory Test).
• 📊 The system will show the state of internal memory (including damaged sectors if any).

Method 3: ADB-Teams (for experienced users):

Connect your phone to a PC with ADB installed and do:

adb shell df -h

This command will display a list of all memory partitions, indicating the free and occupied space. RAM use:

adb shell dumpsys meminfo

4. Third-party applications for memory analysis

If the system tools don't seem to be enough, you can use third-party utilities that not only show the amount of memory you have, but also help you find the "eaters" of space.

• 📊 Files by Google – shows detailed statistics on files, sorts them by size and type (photo, video, APK).
• 🔍 SD Maid – Finds junk files, duplicates and remnants of deleted applications.
• 🛠️ DevCheck – displays specifications, including detailed information about RAM storage.
• 📈 DiskUsage – visualizes occupied space in the form of a diagram (convenient for finding “heavy” folders).

Example of Files by Google:

1. Install the app from Google Play.
2. Open it and give access to the files.
3. Go to the Cleanup tab - here files will be offered for removal (cache, duplicates, large files).
4. In the Analysis tab, you can see the distribution of memory by category (photo, video, APK, etc.).

💡

If you have not added free space after cleaning through Files by Google, check the Android/obb folder – there are often heavy files from remote games (for example, PUBG Mobile or Genshin Impact can leave gigabytes of garbage).

The advantage of third-party apps is that they show hidden files that are not displayed in the standard MIUI Explorer. For example, the.thumbnails folder can weigh several gigabytes, but it can not be seen without root rights or special utilities.

5 How to Free Memory on Redmi 9: Quick Ways

If the test shows that memory is critically scarce (less than 10% of free space), here’s what you can do right now:

• 🧹 Cache cleanup: Settings → Memory. → Clear the cache (can be removed before) 1-3 GB).
• 🗑️ Remove Unnecessary Files: Check Downloads folders, DCIM/Screenshots Bluetooth – Old screenshots and transferred files are often accumulated here.
• 🎮 Games like Call of Duty Mobile or Free Fire can weigh in on the game 2-4 GB each. Remove unnecessary ones or clear their cache in Settings → Annexes.
• 📁 Transfer files to a memory card: If you have a microSD installed, transfer photos, videos, and music (but not apps) to it!).

For deep cleaning:

1. Go to Settings → Applications → Application Management.
2. Sort by size and remove unnecessary programs (especially those weighing >100MB).
3. Pay attention to apps like Facebook, TikTok or WhatsApp – they can take up gigabytes due to cached videos.

💡

Do not remove system applications (e.g. com.miui.gallery or com.android.settings) without root rights – this can lead to unstable phone operation.

If after all the manipulations, the memory still runs out, consider the following options:

6. Frequent Memory Mistakes and Myths on Xiaomi

When working with memory on Redmi 9 users often encounter misunderstandings.

Myth 1: “RAM Cleaning Speeds Up Your Phone”

In fact, MIUI manages RAM itself. Forced cleaning (through boosters or manually) forces the system to reload applications the next time it opens, which slows down rather than speeds up, except if RAM is clogged due to a memory leak in an app (e.g., older versions of Facebook).

Myth 2: “Forming a memory card as an internal memory card will speed up the phone.”

This feature (Settings → Memory → SD Card → Internal Memory) does allow you to use microSD as part of your primary storage, but:

• ⚠️ The card will be encrypted and will not be read on other devices.
• ⚠️ Speed depends on the card class (for Redmi 9 you need a minimum). UHS-I Class 10).
• ⚠️ When you remove the map, the applications installed on it will stop working.

Myth 3: “Deleting system applications will free up a lot of space”

Yes, some pre-installed programs (e.g. Mi Video or Mi Music) take up space, but they can't be removed without root rights. And if you get root, you can lose the security and stability of the system. → Annexes → Shut down).

Cleaning up RAM is damaging productivity

Formatting SD as internal memory is dangerous

System applications cannot be removed without consequences

I knew all of this before I read it.-->

FAQ: Frequent questions about memory at Redmi 9