Xiaomi and Redmi smartphone owners often face the need to control free space. The device’s built-in memory is a limited resource that tends to run out quickly due to app installation, photo accumulation and instant messengers. Understanding how this resource is distributed is key to a stable gadget.
There are two main types of memory that users confuse: RAM and embedded ROM, which is responsible for the number of applications running simultaneously and the speed of switching between them, and the built-in storage for your MIUI operating system, installed programs, music and video files.
Lack of space can lead to serious problems: the phone will slow down, cameras will stop recording videos, and new applications will not be able to update. In this article, we will discuss in detail where to find accurate information about the filling of disks, how to distinguish system files from user files, and how to safely free up space.
Differences between operational and embedded memory
Before we get to the technical details of the verification, we need to understand the difference between the types of data storage. RAM only works when the device is turned on. It stores the temporary data of running processes. Once you turn off the smartphone or application, the data in RAM is cleared. The larger the RAM volume, the more programs can run in the background without rebooting.
Embedded memory (ROM or NAND) is a permanent storage, the equivalent of a hard drive in a computer, and it stores the MIUI shell itself, all your contacts, gallery, downloads and app cache, and it's this parameter that most people are interested in when they hear a message about a space shortage, and it's important not to confuse these concepts, because optimization methods for them are radically different.
⚠️ Warning: Attempts to clean system files in the internal memory partition manually through the file manager can lead to malfunctions in the operating system.
Modern Redmi models use different standards for read and write speeds. For internal memory, eMMC 5.1 and faster UFS 2.2 or 3.1 are relevant. RAM in top models works according to the LPDDR4X or LPDDR5 standard. These specifications directly affect how fast the phone will open heavy games or process photos.
Memory volume check through system settings
The easiest and most reliable way to know how much space is left on your Xiaomi is to use the built-in interface. You don’t need to download third-party apps, since the system provides all the necessary information in detail.
The settings menu has the same algorithm for most versions of the MIUI shell and HyperOS. You need to go to About Phone. This is where all the technical information about your device configuration is collected. Please note that depending on the firmware version, this item may be simply called About Device.
On the About Phone screen, you'll see a few rows of numbers, and we're interested in the Internal Drive (or Memory) line, and if you click on it, the system will do a quick analysis and show you a diagram of the space distribution, and you'll see how many gigabytes are occupied by applications, how many are occupied by images, and how many are by system files.
☑️ What to check in the settings
Also, at the top of the About Phone screen, a fraction is often displayed, for example, 6/128 GB. The first digit indicates occupied volume, the second is the total volume available to the user. It is important to understand that the real volume is always less than the stated volume in the specifications (128 GB), since part is reserved for system partition and formatting.
Using the Security App for Analysis
Every Xiaomi smartphone has a Security system app preinstalled, and it's not just an antivirus, it's a powerful system maintenance combine that includes an advanced memory analyzer. Launch an app with a green shield icon on the home screen.
Inside the app, look for Cleanup. The system will automatically scan the device for junk files, cache and duplicates. However, for a deeper analysis, click on Clean or go to the Storage Management section, and you'll see a more detailed breakdown by file category than in the standard settings.
Deep Clean allows you to find large files you may have forgotten, such as old WhatsApp videos or unnecessary APK installation packages. This is a great way to quickly free up a few gigabytes.
Why is the amount of memory different from what is claimed?
Using the built-in tool is preferable to third-party counterparts, as it has deep system access rights. Third-party "cliners" often cannot remove the system cache without root rights, whereas the native MIUI application does so safely and efficiently.
Detailed analysis through the developer menu
For advanced users who want to get the most accurate technical information, there is a hidden menu — Developers. This displays real-time data, including the use of memory by running processes. To get there, you need to quickly click 7 times on the MIUI version in the About Phone section.
Once you activate the menu, go back to Advanced Settings and select For Developers. Find Memory (or Memory Use). Here you will see the RAM usage schedule for the last 3, 6, or 12 hours, which lets you know which application eats up RAM and causes lags.
And you can see the average amount of free memory in the same menu, if the graph shows that free memory is available. RAM less 10-15%, The system has to constantly unload applications from memory, which leads to them restarting each time they open, which is a direct signal to close the background applications or delete them.
| Parameter | Description | Where to look. |
|---|---|---|
| Totally. | Full physical volume of memory chip | Settings → About the phone |
| Available. | Free space for installing applications | Settings → Memory |
| Systemic | Files required for Android and MIUI | Settings → Memory (Details) |
| Cash app. | Temporary data for programme acceleration | Security Annex |
Third-party monitoring applications
If standard tools are not enough, you can use specialized software from Google Play. One of the most popular and informative tools is CPU-Z or AIDA64. These applications provide comprehensive information about the hardware of your Redmi.
After installing and running a CPU-Z, go to the Device or Memory tab, and here you will see the memory type (LPDDR4X), the number of channels, and the actual frequency. The Storage tab will show the total volume, available space, and file system type. This is useful for checking the declared characteristics when buying a used device.
Another useful tool is Files by Google, which is not just a file manager, but a smart analyzer, which scans memory and groups files by type, suggesting that duplicates, blurred photos and old screenshots be deleted, and the app securely removes only user content without touching the system.
⚠️ Avoid installing dubious apps with names like “Super” RAM Boosters often contain ads and can consume resources themselves, slowing down the smartphone instead of speeding up.
Using third-party software is justified when you need to identify a specific parasitic application that hides its activity in standard settings, but for daily use, built-in MIUI tools are enough.
Optimization and freeing up space on Xiaomi
Once you find out that the memory is full, you need to take action. The most effective way is to work with instant messengers. Telegram and WhatsApp tend to accumulate gigabytes of cache. Go to the settings of a particular chat or channel and select Memory Use, then clear the cache.
The second step is to remove unnecessary apps. In the App menu, sort the list by size. Often, it turns out that games or social networks take up several gigabytes. If the application is rarely used, it's better to delete it or at least clear its data through the app management menu.
The third step is to move media files. Photos and videos take up the lion's share of the space. Use cloud services like Google Photos or Yandex.Disk with autoload and then delete local copies. You can also use a microSD card if your Redmi model supports this format.
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Turn on the Cache Cleanup feature in the Scheduled Security app, which will automatically remove temporary debris once a week without requiring your intervention.
Cleaning Download regularly also produces tangible results, PDF-documents and pictures from the Internet, which are no longer needed, but continue to take place in the built-in drive.
Expanding memory with a MicroSD card
Many of Redmi’s budget and mid-range models feature a hybrid slot, which means you can install a microSD card up to 512GB or even 1TB. This turns the smartphone into a multimedia center.
Once you have the card installed, the system will suggest formatting it. Choose Use as a portable storage option, where you can transfer photos, music, videos and documents to the map, and some applications also allow you to select the memory card as a place to store data.
Therefore, it is not recommended to carry the apps themselves, especially heavy games, as this can lead to increased loading times and twitching in games.
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A memory card is the perfect solution for storing photo archives and music, but system applications and games are best left on an internal fast drive for maximum performance.
To set up the map, go to Settings → Memory. There you will see a list of files that can be moved. Check this section regularly so that media files are automatically saved to an external medium, freeing up precious internal space.