Smartphones based on the operating system Android over time inevitably begin to work slower. This occurs due to the accumulation of temporary files, remnants of uninstalled apps, and the growth of the application cache. Users often notice that free memory space is disappearing before their eyes, and the interface begins to slow down even on relatively new devices.
Proper cleaning operating system can restore its former speed and free up gigabytes of valuable space. In this article, we will analyze not only standard methods, but also hidden mechanisms of the file system, which will help you deeply clean the device without losing important data.
Do not panic if the memory indicator is red. There are many tools built directly into your phone's shell, as well as proven third-party utilities. The main thing is to understand which files can be deleted painlessly, and which are critical for the operation of system processes.
Analysis of internal memory fullness
Before taking radical measures, it is necessary to conduct a detailed diagnosis of the storage. The standard settings menu often shows only the overall picture, hiding the real space eaters. You will need to go to the Settings → Storagesection to see a detailed breakdown by category.
Pay attention to the “Other” or “Miscellaneous” item. This is where files that the system cannot automatically classify are often hidden. These can be disk images, archives, firmware update files, or instant messenger data saved in hidden folders.
Using specialized disk analyzers gives a more clear picture of the file structure. Such apps visualize memory as colored blocks, where the block size corresponds to the file size. This allows you to instantly find forgotten 4K videos or forgotten installation packages APK.
⚠️ Attention: When deleting files through third-party analyzers, be extremely careful. Removing system libraries from folders
/systemor/datacan lead to the phone not working and require flashing.
Regular monitoring helps identify parasitic applications that grow disproportionately to their functions. For example, some social networks can take up several gigabytes of cache, although their main functionality does not require such a volume of temporary data.
Clearing the application cache and system data
Cache is temporary data that applications save to speed up their work. Over time, these files become outdated, but continue to take up space. Clearing the cache is the safest procedure since it does not delete your personal settings or logins.
To manually clear it, go to Settings → Applications. Select the specific app that is taking up a lot of space and click the Clear Cache button. Do not confuse this button with the “Clear data” option, which will reset the application to its factory state.
In some shells, such as MIUI or One UI, there is a mass clear function. It allows you to delete temporary files of all apps with one click. However, this method is less effective than targeted work with heavy applications.
- 🗑️ The browser cache can reach hundreds of megabytes due to saved site images.
- 📸 The gallery creates thumbnails that take up space even after deleting the originals.
- 📱 Messengers like Telegram and WhatsApp store media files in the public domain, duplicating them in the cache.
Particular attention should be paid to services Google Play. Sometimes the update download process freezes and the files remain in memory forever. Clearing the app store cache often solves problems with downloading new software.
Periodically clear the cache of the YouTube application, as it aggressively saves streaming video for pre-loading, taking up a lot of space.
Deleting residual files and empty folders
When uninstalling applications using standard means Android, “tails” often remain in memory. These could be folders with settings, error logs, or downloaded data that the developer did not provide for automatic deletion.
To find such garbage, it is recommended to use a file manager with a search function for empty directories. Empty folders themselves take up negligible space, but their number can number in the thousands, which slows down the indexing of the file system.
Residual files are most often located in the root of the internal memory or in a folder Android/data. Look for directories with the names of deleted games or apps. If you are sure that the application is no longer needed, you can safely delete such a folder.
| File type | Extension | Can it be deleted? | Where is |
|---|---|---|---|
| Temporary file | .tmp | Yes | Cache folder |
| System log | .log | Yes (with caution) | /data/log |
| Installation package | .apk | Yes | Folder Download |
| Database | .db | No | Android/data |
Sometimes files are saved in memory .nomedia. They tell the system not to scan the folder for media files. If you have deleted all the photos from a folder, but it still appears as empty in the gallery, it may be worth checking for such markers.
☑️ Check for residual garbage
Working with multimedia and duplicates
Photos and videos are the main consumers of space on a modern smartphone. Cameras are getting better, and the weight of one photo can reach 10-15 MB, and a minute of video in 4K can be hundreds of megabytes. Regular revision of media files is mandatory.
Use the built-in Google Photos tools or your smartphone's galleries to search for duplicates. Often we take a series of ten identical pictures to choose the best one, and forget to delete the rest. It is also worth checking the folder Screenshotswhere screenshots that are no longer relevant are accumulated.
Video files should be transferred to cloud storage or a computer. Storing archives of family holidays on your phone is ineffective. If deletion is not possible, use the “Free up space” function, which deletes copies already saved in the cloud from the device.
⚠️ Attention: Before mass deleting photos, be sure to check synchronization with the cloud. Deleting the original from the phone may lead to its disappearance from the cloud if synchronization works in mirroring mode.
Don't forget about the folder DCIM/.thumbnails. This is a hidden folder where the system stores thumbnails of your photos. Over time, the file .thumbdata can grow to several gigabytes. Deleting it is safe - the system will create it again, but in a smaller size.
How to delete an overgrown thumbnail file?
Go to the file manager, turn on the display of hidden files, go to DCIM/.thumbnails and delete the .thumbdata file. After this, restart your phone.
Optimizing the work of messengers
Messengers have become an integral part of life, but they are also the main “garbage collectors”. Telegram, WhatsApp and Viber by default save all received photos and videos to internal memory, creating duplicates.
In the Telegram settings, you can limit the automatic downloading of media. Go to Settings → Data and storage → Auto-download media and disable this feature for mobile networks and Wi-Fi. This will prevent your memory from becoming clogged in the future.
Whatsapp has a built-in storage management tool. It allows you to see the chats that take up the most space and selectively delete sent files. Often old cards and congratulations received a year ago take up gigabytes.
Regularly clean the “Documents” tab in instant messengers. Users often send presentations, archives and PDF files, which are downloaded automatically. If you have already read the document, you no longer need a local copy of it.
- 📂 In Telegram, you can clear the cache selectively: only photos, only videos or only files.
- 💬 In WhatsApp, use the “Manage Storage” function to delete large files from chats.
- 🚫 Disable autosave in Viber so that media does not go straight to your phone gallery.
Setting up auto-loading in instant messengers is a one-time action that will save you gigabytes of memory in the long run.
Resetting settings as a last resort
If none of the above methods helped free up enough space or eliminate the brakes, a radical method remains - resetting to factory settings. This action completely erases all data from the device, returning it to its out-of-the-box state.
Before performing this procedure, it is critical that you take a full backup. Save contacts, photos, documents and application settings to the cloud or external storage device. Without a backup, you will lose all information irrevocably.
The reset process is started through the menu Settings → System → Reset settings. Select "Delete all data". The phone will reboot and the formatting process will begin, which may take from 5 to 20 minutes depending on the amount of memory.
⚠️ Attention: Make sure the battery level is at least 50% before starting the reset. Interrupting the formatting process due to low battery can “brick” the device.
After the reset, the system will work as quickly as possible, since there will be no accumulated software garbage and settings conflicts. This is the best way to revive an old smartphone before selling or transferring it to another user.
What to do if the phone does not turn on after a reset?
If the device is stuck on the logo, try entering Recovery mode (usually by holding down the volume up and power button) and select Wipe Cache Partition. If it doesn’t help, you will need to flash it via PC.
Frequently asked questions (FAQ)
Is it safe to use cleaner applications from the Play Market?
Most popular cleaners are safe, but they often work ineffectively. They create the appearance of vigorous activity by deleting the cache, which the system will immediately create again. In addition, such applications themselves consume resources and display advertisements. Built-in Android tools are usually sufficient.
Why is space not freed up after deleting applications?
Perhaps you only deleted the shortcut from the desktop, and not the application itself. Also check the folder Android/obb —heavy data files from games may remain there. Sometimes the phone needs to be restarted for the system to recalculate the free space.
Is it possible to delete the Android folder?
It is strictly forbidden to delete the entire folder Android. It stores data from all installed applications. Deleting this folder will cause apps to stop running and lose settings and logins. You can only delete specific subfolders inside data or obbrelated to deleted games.
How to clear the system partition if it is full?
The system partition (/system) is write-protected by the usual by users. If it is full, it is usually a display error or the result of malware. Try clearing the recovery cache (Wipe Cache Partition) through the Recovery menu. In rare cases, only flashing the device helps.
Does memory fullness affect Internet speed?
Directly - no. However, if the memory is full, the system has no place to create temporary files for the browser and network services to operate. This can lead to freezes when loading pages or connection breaks due to a lack of processor resources to service background tasks.