Smartphones of the line Xiaomi Redmi have earned a reputation for affordable and reliable devices, but the Redmi 7 model, released in 2019, often faces a lack of built-in storage. Basic versions with 16 or 32 gigabytes quickly fill up with modern applications, heavy system updates and multimedia content. When the internal memory is full, the device begins to work slower, and installing new apps becomes impossible.
In this article, we will examine in detail proven ways to free up space and actually expand the available space. You will learn how to use external drives wisely, what hidden MIUI functions help with cleaning, and why standard methods may not be effective enough. The right approach to file management will extend the life of your gadget without purchasing new equipment.
Many users mistakenly believe that deleting old photos is the only way out. In fact, system junk messenger caches take up much more space than it seems at first glance. We will look at tools that allow you to safely delete unnecessary data without affecting important information.
Analysis of storage fullness and hidden files
Before taking decisive action, you need to understand what exactly is taking up space in your memory Redmi 7. The default MIUI tools provide a basic analyzer, but it often hides large folders created by third-party applications. For deep scanning, it is recommended to use specialized utilities or the built-in explorer with extended display rights.
Pay attention to the folder Android/obb i Android/data. This is where cached data from games and heavy applications, which can weigh several gigabytes, is stored. Deleting these files will require you to download the content again the next time you start the apps, but this frees up a significant amount of space.
It is important to distinguish between user files and system partitions. In some cases, the page file itself or the error log can grow to unimaginable sizes. The tombstones file in the data/tombstones folder can take up to 2 GB of space and is safe to delete if you are not debugging applications.
⚠️ Attention: When manually cleaning system folders through the file manager, be extremely careful careful. Deleting files with the .apk extension from system directories or configuration files can lead to unstable operation of the MIUI interface.
It is convenient to use graphic analyzers to visualize space. They build a memory map where the size of the square corresponds to the weight of the file. This allows you to instantly find forgotten video archives or backups that you created six months ago.
Using a microSD memory card as internal memory
One of the most effective ways to solve the problem of lack of space is to use a microSD card. Unlike many modern flagships, Redmi 7 retained a separate slot for a memory card, which allows you to combine two SIM cards and a drive. However, simply inserting a card does not always automatically transfer applications there.
Activating the Adoptable Storage feature often requires performing certain actions through the developer menu or special commands. In the MIUI shell, this feature is sometimes hidden, but is available through the storage settings. After formatting the card as an internal drive, the system begins to perceive it as an extension of the built-in flash memory.
Risks of using a memory card as an internal one
Using budget memory cards (class 4 or 6) as a system drive can lead to a significant slowdown in the operation of the smartphone. The system will constantly access the slow media, which will cause interface freezes. It is recommended to use UHS-I U3 or higher class cards.
After successful formatting, all new applications will be installed on the external drive by default. You can also move existing apps there through the app management menu. This frees up precious gigabytes of internal memory for system processes that require high read and write speeds.
☑️ Checking the readiness of the memory card
It is worth considering that after formatting the memory card will be encrypted and cannot be read on other devices without reformatting. This is a security measure to prevent data theft. If you plan to change cards frequently, this method may be inconvenient.
Clearing the cache of instant messengers and social networks
The most power-hungry applications on any Android smartphone are instant messengers. Telegram, WhatsApp and Viber save every photo and video you view in a cache. Over time, this “digital dust” can take up to 10-15 gigabytes, which is critical for Redmi 7 those with a small amount of built-in memory.
In Telegram, cleaning is done most flexibly. Go to Settings → Data and memory → Memory usage. Here you can set the cache to be automatically deleted, for example, after 3 days or a week. A "Clear cache" button is also available, which does not delete your conversations, but only erases downloaded media files from the device.
WhatsApp requires a more manual approach. Inside the application, go to Settings → Data and storage → Storage management. The system will show a list of chats that take up the most space and allow you to delete specific videos or documents. Users often forget about groups where they transfer heavy files every day.
- 📱 Use built-in cleaning tools in the applications themselves, and not just the system cleaner.
- 🗑️ Disable autosave in gallery for all chats and channels.
- 📹 Set a limit on the size of the downloaded video in the transfer quality settings.
- 🔄 Regularly check the "Documents" folder in messengers for old files.
Social networks such as VK or Instagram also cache viewed feeds. In the settings of these applications there is often a “Clear cache” function. If it is not there, you will have to use the application management menu in the Android settings: Settings → Applications → All applications → [Select application] → Memory → Clear cache.
Enable the "Traffic Saving" function in instant messengers. This will not only save the mobile data, but will also prevent heavy videos from being automatically loaded into the cache until you click on them.
Transferring applications to an SD card without root access
Not all applications allow you to transfer themselves to a memory card using standard means. Developers often block this feature, demanding the high speed that only built-in drives provide. However, MIUI has workarounds for some system and user applications.
Try using the "Move" function in the application settings. If the button is inactive, you can try a trick by changing the developer settings. Enable developer mode by tapping 7 times on the build number in the "About phone" section. Then look for the option “Record as default” or “Force allow apps on external”.
After enabling this option, many applications that previously did not want to be moved will have this opportunity. Restart your device and check your application list again. Now the transfer button should appear in the memory management menu.
⚠️ Attention: The developer menu interface may differ in different versions of MIUI. If you do not find the item you need, the manufacturer may have blocked this feature at the firmware level for your model.
It is important to understand that even if the transfer is successful, some of the application data (the so-called ODEX files) will still remain in the internal memory. This is necessary for fast loading of apps. Therefore, it will not be possible to completely free up the built-in storage, but reducing its capacity by 30-40% is quite possible.
Removing system garbage and duplicates
During the operation of a smartphone, not only user files accumulate, but also remnants of deleted apps, error logs and temporary update files. Xiaomi's standard Security application does a good job of basic cleaning, but often misses duplicate files.
To find identical photos and documents, it is better to use specialized algorithms. Many files may have different names, but identical content (for example, pictures saved from different sources). Deleting such copies is safe and effective.
You should also pay attention to the folder Download (Downloads). Browsers and instant messengers often save APK installation files there after updating applications. These files are no longer needed, since the app is already installed, and they can be safely deleted.
The table below shows examples of folders that often contain garbage and an assessment of the safety of cleaning them:
| Folder / Path | Content type | Deletion security | Recommendation |
|---|---|---|---|
/MIUI/debug_log |
System debugging logs | High | Can be deleted if debugging is not in progress |
/WhatsApp/Media/.Statuses |
Viewed statuses | High | Hidden folder, takes up a lot of space |
/Android/data/.thumbnails |
Gallery thumbnails | Medium | Delete, but they will quickly be created again |
/Download/*.apk |
Application installers | High | Delete after installing apps |
Regular checking of these directories will help keep the system in good shape. Don't forget that after clearing the thumbnails, the gallery may run slower on first launch until it re-creates the image previews.
Resetting settings as a radical method of increasing memory
If none of the soft methods helped, and the phone still signals about a lack of space, the last resort remains - a full reset to factory settings (Hard Reset). This process deletes all user data, returning the smartphone to its “out of the box” state, which is guaranteed to free up all available memory.
Before starting the procedure be sure to create a backup copy important contacts, photos and documents. You can use the Mi Cloud cloud service, Google Drive, or transfer files to your computer. Without a backup, you risk losing all important information forever.
To perform a reset, go to Settings → About phone → Reset settings → Erase all data. The system will ask for confirmation and an unlock password. The process will take a few minutes, after which the phone will turn on like new. You will have to re-set up accounts and install applications, but performance and free space will be maximum.
A full reset is not just clearing memory, it is an opportunity to get rid of system errors and software conflicts that have accumulated over years of use.
After the reset, do not rush to install all applications at once. Install only the minimum required and watch how the memory fills up. This will help identify the “culprit” for the rapid consumption of space if the problem recurs.
Why does the memory quickly fill up again after cleaning?
Often the cause is background processes and automatic updates. Check your autosave settings in clouds and instant messengers. Also, some applications can create hidden copies of data that are not deleted during standard cleaning.
Is it possible to increase the memory on Redmi 7 using a USB flash drive?
Yes, if you use an OTG adapter. However, this is a temporary solution for viewing files, since it is impossible to launch applications directly from a USB drive via OTG on standard MIUI firmware without deep modification of the system.
Does full memory affect the speed of the Redmi 7?
Yes, critically. When free space runs out, the system has no place to place temporary files and process caches. This leads to constant access to slow memory sectors, causing severe slowdowns and interface freezes.
Is it safe to use cleaner applications from the Play Market?
Most of them are useless or even harmful, since they themselves consume resources. The built-in MIUI cleaner is quite enough. Third-party cleaners often simply duplicate its functions, but with intrusive advertising.