Xiaomi and Redmi smartphone owners often face a situation where internal storage is overcrowded, which leads to slowdowns and the inability to install new applications. This is a common problem, as modern multimedia files weigh more and the base memory in budget models is limited. However, the MIUI operating system and its modern version of HyperOS offer powerful built-in space management tools that do not require the installation of third-party software.
In this article, we will take a look at all the optimization methods available, from quick garbage cleaning to deep analysis of folders with heavy files. You will learn to distinguish system debris from important data and understand which folders can be deleted without the risk of loss of information.
Before you start taking radical measures like resetting, it's worth trying a full-scale cleaning with regular funds. Often users don't even realize that tens of gigabytes are taking up hidden copies in the gallery or messenger cache. Let's look at a step-by-step algorithm for freeing up space.
Use of the built-in "Security" application
The first step in the fight for space should be the use of a native tool from the shell developers. Every Xiaomi smartphone has a Security app preinstalled, which includes the functionality of “Cleanup”, which scans the system for temporary files, residual debris after removing programs and duplicates.
Launch the app and click on the big scan button. The system will automatically find files that can be safely deleted. However, don't blindly trust the automation: after scanning, carefully review the list of proposed items for removal. Sometimes the garbage section will get thumbnails of images or important application logs that you use daily.
You can also look at the Deep Cleanup section inside the same app, where you can find large files, old APK installation packages, and rarely used applications, and removing the installers is an easy way to get back a few gigabytes, because once you install the app, you don't need those files anymore.
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Start a deep cleanup once a week to prevent temporary files from accumulating that slow down the file system.
However, before mass deletion, it is always best to double-check the contents of folders, especially if you store work documents on your phone.
Analysis and cleaning of messenger cache
The main devourer of free space on modern smartphones are messengers such as Telegram, WhatsApp and Viber, which store every photo, video and voice message viewed into internal memory, and over time, folders with media files can grow to 10-20 gigabytes or more, taking up the lion’s share of available space.
Unlike other apps, messengers often don’t delete files when you normally clean your cache through your Android settings. You’ll need to go to the settings of the app itself. For example, in Telegram, you need to go to Settings → Data and Memory → Memory Use and click the Clear Cache button. This action will not delete your correspondence, but only remove downloaded media files from the device; if necessary, they will be downloaded again from the cloud.
For WhatsApp, the procedure is a little different. Go to Settings → Data & Storage → Storage Management. Here you will see a list of chats sorted by location. You can selectively delete heavy videos or files from specific dialogues without deleting the entire history of the correspondence.
- 🗑️ Turn on the autodelete feature in the messenger settings so that media files are erased a week or a month after viewing.
- 📂 Turn off auto-save photos and videos in the phone gallery in the privacy settings of each messenger.
- 🚫 Leave crowded group chat rooms regularly, where heavy videos and stickers are constantly forwarded.
⚠️ Attention: Clearing the application data (not to be confused with cleaning the cache) will result in the complete removal of all correspondence and settings within the messenger».
Managing Photos and Videos via Google Photos and the Cloud
Media files make up the bulk of user data. Redmi's high-resolution cameras can take hundreds of megabytes to capture one minute of 4K video, and you need to move the archive to the cloud or to your computer to free up memory.
The most efficient way is to use Google Photos, which has a Free Space feature that finds photos and videos already stored in the cloud and removes a local copy from the device, allowing you to leave media files over the Internet, but offload internal memory.
Also worth paying attention to is the Recycle Bin folder in the gallery. Deleted photos are often stored there for another 30 days, continuing to take up space. Cleaning the Recycle Bin is an instant way to get back occupied space. Similarly, check the "Recently Deleted" folder in the Google Photos app.
If you don't trust cloud services or you don't have a stable Internet connection, regularly transfer your files to your computer, and after you transfer your files, create a new folder on your phone, move the processed images, and delete the old archives.
Finding and Deleting Duplicates and Large Files
When you use a smartphone, you accumulate duplicate files in your memory, which can be due to download failures, copying files between folders, or messengers that store the same images in different directories, and manually finding such mines is extremely difficult.
Use a file manager, such as Xiaomi’s built-in Explorer or third-party solutions like Total Commander. Sort files by size to identify heavyweights. Often, at the root of internal memory or in the Download folder, you can find forgotten movies or archives that you no longer need.
Specialized utilities can be used to search for duplicates (same files with different names or in different folders), but even a standard storage analyzer in the phone settings (Settings → Memory) will show the distribution of space by category. Pay attention to the category “Different” or “Other” – often there are hidden data from remote applications or browser cache.
| File type | Where to find | Can I remove it? | Recommendation |
|---|---|---|---|
| .apk | Download folder | Yes, if the app is installed | Remove everything after installation |
| .tmp | System root/Temper | Yes. | Safe cleaning |
| log | Application folders | Yes. | You can remove it, you can borrow a little. |
| .nomedia | Everywhere. | No. | System file, don't touch it. |
When working with files, it is important to understand their purpose. Deleting system files can lead to unstable Android work. If you are not sure about the origin of the file, you should Google its name or extension beforehand.
Disconnect synchronization and work with the cloud
Often, memory fills up not because you take a lot of pictures, but because the phone downloads full versions of photos from the cloud for offline access. Mi Cloud or Google Photos sync settings can be optimized to save space.
In the Xiaomi Gallery settings, you can enable the option “Storage Optimization”, with only reduced previews of photos remaining on the device, and high-quality originals stored in the cloud, and the full photo will only be uploaded when viewed with the Internet.
It’s also worth checking autosynchronization settings for other applications, such as Google Docs, OneDrive, or Dropbox can cache files to work without a network. If you don’t need constant offline access to those files, turn off the Offline Available feature for specific folders or files.
What is a folder.thumbnails?
Expanding Memory with a MicroSD Card
Not all Redmi models support memory cards, but if your smartphone has a microSD slot, it's a great way to offload internal storage. Modern 128 or 256GB cards are inexpensive and can hold a huge archive of data.
After installing the card, it is recommended to configure the phone so that the camera and voice recorder by default save files to an external medium. → Retention on SD-map) and in the settings of the recorder.
You can also transfer music, movies and downloaded navigator maps to the memory card. In the file manager, simply move the Music, Movies and Maps folders from the internal memory to the root or folder of the external memory. SD-This will free up precious internal space for the system and applications to operate.
- 💾 Choose a memory card of a speed class not lower than Class 10 or U1/U3, So that the phone interface does not slow down.
- 🔄 Regularly check the memory card for errors, connecting it to the computer.
- ⚡ Do not remove the memory card while recording a video or saving a file to avoid damaging the data.
⚠️ Note: When formatting a memory card as an "inside storage" (Adoptable Storage), the data on it is encrypted and becomes unavailable on other devices. Use this mode only if the card is on the phone constantly.
Radical measures: Resetting and formatting
If none of the above methods helped to free up enough space, there may have been an accumulation of errors or fragmentation in the file system, in which case a complete reset to factory settings may help.
Before you do this, make sure you back up all your important data to your computer or the cloud, and reset will delete everything: contacts, messages, apps, files, and when you reset, your phone will be like a new one, with a clean file system.
To perform the reset, go to Settings → About Phone → Settings Reset → Erase All Data. In some versions of MIUI, the path may be different: Advanced Settings → Recovery and Reset. Make sure the battery is at least 50% before the process begins.
☑️ Checklist before reset
After reset, take your time to install all the applications at once, install only the ones you need and watch the memory fill, which will help you understand what application or action is causing storage to fill up quickly in the future.
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Regular prevention and use of cloud services avoid the need to completely reset your phone during its lifetime.