Modern smartphones based on the operating system Android have enormous capabilities, but over time their performance may decrease. One of the main reasons for slowdowns and lack of free space is the accumulation of garbage data. Temporary files, or caches, are created by applications to speed up work, but over time they grow to gigabyte volumes, taking up precious memory.
Many users wonder how to safely delete this digital junk without damaging important data or system settings. Proper cleaning can not only free up space for new photos and applications, but also significantly extend battery life by reducing the load on the processor. In this article we will analyze in detail all the current methods for deleting temporary files.
What is cache and why delete it
Cache is a memory area where temporary data is stored, necessary for quickly launching apps and loading content. When you open your favorite instant messenger or social network, system saves some of the images and texts locally so that you don’t have to download them again from the Internet the next time you log in. This saves traffic and waiting time.
However, the problem is that these files are rarely deleted automatically in full. Over time, an archive of outdated pictures, scripts and logins can occupy up to 30-40% of the total internal memory of the device. This is especially true for browsers and streaming services that cache video streams.
Regularly clearing the cache returns the smartphone to its former agility. This is especially important for budget models with a small amount of built-in storage. If you ignore this procedure, the device may become unstable, and some applications may crash with errors due to full system partitions.
⚠️ Attention: Clearing the cache deletes only temporary files. Your personal photos, contacts, correspondence and installed applications will remain completely safe. Do not confuse this procedure with resetting to factory settings.
Periodicly clearing the cache every 2-3 months helps maintain stable operation of the system without the need for a full reset.
Cleaning through the built-in Android settings
The safest and most correct way to remove garbage is to use standard operating system tools. Smartphone manufacturers, such as Samsung, Xiaomi or Google, build in special utilities to maintain the device. You can find them in the section Settings → Device Maintenance or Settings → Storage.
In this menu, the system will automatically analyze the occupied space and offer to delete unnecessary files. Usually the algorithm finds the remains of deleted applications, duplicates and the same cache. All you have to do is confirm the action by pressing one button. This is the most preferred method for inexperienced users.
If automatic cleaning does not free up enough space, you can delete the cache manually for specific “heavy” applications. Go to Settings → Applications, select the desired app (for example, YouTube or Instagram) and find the item "Storage". There you will see two buttons: “Clear cache” and “Clear data.”
- 📱 Clearing the cache deletes temporary files, but saves your login and settings inside the application.
- 🗑️ Clearing data completely resets the application to its “as after installation” state, deleting all accounts and preferences.
- ⚙️ The system cache can be safely cleared through the Recovery menu, but this requires rebooting the phone.
Use manual clearing wisely. If you use your navigator frequently, clearing its cache will force the device to reload maps of the area, which will increase the consumption of mobile traffic. Therefore, it is better to specifically remove garbage from apps that you rarely use.
☑️ Check before manual cleaning
Deleting temporary files through the file manager
A more advanced method involves working with the file system directly. To do this, you will need any file manager, for example Files by Google or the built-in Explorer. This method allows you to find and delete files that system utilities may miss.
First of all, pay attention to the folder Download (Downloads). Installation files APK, documents and pictures from the Internet that you no longer need are often saved here. It is also worth checking the folder for hidden thumbnails (.thumbnails), which can take up gigabytes of space. Many applications create their own folders in the root of the internal memory with names like DCIM for the presence of hidden thumbnails (.thumbnails), which can take up gigabytes of space.
Many applications create their own folders in the root of the internal memory with names like Temp, Cache or Log. Error reports and temporary data are stored inside them. You can safely delete the contents of these directories, but do not delete the folders themselves, if the application actively uses them - it will create them again.
| Folder type | What's inside | Can be deleted | Risk of data loss |
|---|---|---|---|
| Download | Downloaded files, APK | Selective | High (you can delete the desired file) |
| Cache / Temp | Temporary application data | Yes | Low (only cache) |
| DCIM/.thumbnails | Thumbnails of photos and videos | Yes | Low (the gallery will recreate them) |
| Android/obb | Cache of heavy games | No | High (game will stop working) |
When working with the file system, be extremely careful. Accidental deletion of system files from a folder Android can lead to incorrect operation of apps. If you are not sure of the purpose of the file, it is better to leave it alone or first move it to your computer.
How to find hidden folders with thumbnails?
In most file managers, you need to enable the display of hidden files in the menu settings. Look for the .thumbnails folder inside DCIM. Removing it will free up space, but the next time you open the gallery, the phone may freeze slightly, creating thumbnails again.
Using specialized cleaning applications
If manual cleaning seems too difficult or time-consuming for you, third-party utilities will come to the rescue. The store Google Play presents many cleaning applications, such as CCleaner, Clean Master or SD Maid. They automate the garbage search process.
Such apps scan the device using complex algorithms, finding not only the cache, but also empty folders, outdated files and duplicates. Some have a "RAM boost" feature that shuts down background processes, freeing up RAM for current tasks. This may be useful for older phone models.
However, it is worth remembering that aggressive cleaners can sometimes delete necessary data, for example, saved passwords in the browser or login sessions in games. In addition, some free versions of such applications are overloaded with advertising, which in itself slows down the smartphone.
⚠️ Attention: Avoid installing dubious apps with names like “Super Fast Cleaner 2026”. Often they are mining viruses or simply useless garbage that they themselves generate.
Choose only proven solutions with high ratings and millions of downloads. The best choice is Files by Google, since this is an official application from OS developers, which does not contain intrusive advertising and works as correctly as possible with system files.
Third-party applications are convenient for quick cleaning, but require careful selection so as not to harm the system with advertising or erroneous data deletion.
Cleaning cache in Recovery mode
For cases when the phone is extremely unstable or does not boot normally, there is a cleaning method through the Recovery menu. This method deletes the system cache, which cannot be deleted during normal operation. Android.
To get to this menu, you need to turn off the smartphone and hold down a certain combination of buttons (most often it is Volume Up + Power or Volume Down + Power). The combination depends on the model of your device: for Samsung this is often three buttons at the same time, for Xiaomi - two.
In the menu that appears, control is carried out volume buttons, and selection with the power button. Find item Wipe Cache Partition. It is important not to confuse it with the item Wipe Data/Factory Reset, which will delete all your personal files! After selecting, confirm the action and wait for the process to complete, then select Reboot System Now.
- 🔄 This method is safe for personal data (photos, contacts are not deleted).
- 🛠️ Useful after major system updates, when there is a lot of old cache left.
- ⛔ Do not use this method unnecessarily if the phone is working properly.
After the first boot, the system may run a little slower than usual, as it will have to optimize the applications again. This is a normal phenomenon that will pass within 10-15 minutes of use.
Prevention and automation of cleaning
In order not to encounter the problem of low memory regularly, it is better to set up preventative measures. Many modern Android skins have a built-in auto-cleanup feature. Find the “Auto-optimization” or “Device care” item in the settings and activate it.
It’s also worth reconsidering your habits of using instant messengers. You can configure automatic deletion of media files after a certain period of time. Go to the chat settings and set the storage period for photos and videos, for example, 3 days or 1 week. Telegram And WhatsApp You can configure automatic deletion of media files after a certain period of time. Go to the chat settings and set the storage period for photos and videos, for example, 3 days or 1 week.
Regularly transferring photos and videos to cloud services such as Google Photos or Yandex.Diskalso helps free up space. These services often have a “Free up space” function that removes files from the device that have already been uploaded to the cloud.
⚠️ Attention: Settings interfaces may vary depending on the Android version and phone model. If you do not find the described item, use the search in the settings or refer to the manufacturer's official instructions.
Remember that completely free memory (when less than 5-10% is occupied) is also harmful to the speed of flash memory. Try to keep at least 15-20% of the total storage capacity free for the correct operation of the system and wear resistance mechanisms.
Configure in messengers to disable automatic loading of media to the gallery. This will prevent duplication of files and save space.
Frequently asked questions (FAQ)
Will clearing the cache delete my passwords and correspondence?
No, clearing the cache (Cache) does not affect your personal data, logins, passwords or correspondence history. It deletes only temporary files to speed up work. However, if you click “Clear Data”, then all the information inside the application will be deleted, and you will have to re-enter your login and password.
How often should you clear temporary files on your phone?
For most users, cleaning it once every 1-2 months is enough. If you actively use social networks, watch a lot of videos or install a lot of games, you can do this more often - once every 2-3 weeks. Modern systems themselves do a good job of managing memory, so daily cleaning is usually not required.
Why does the application run slower after clearing the cache?
This is a temporary phenomenon. After deleting the cache, the application must reload the necessary data from the network or disk and create new temporary files. When you first start it after cleaning, it may slow down, but after a few minutes of operation the speed will be restored and may even become higher due to the lack of fragmentation of old files.
Is it possible to delete the Android folder completely?
It is strictly not recommended to delete the entire folder Android entirely. Inside it there are subfolders data and obbthat contain important application settings and game caches. Deleting this folder will reset all apps and lose progress in games. Delete only the contents of subfolders cache inside it if you are confident in your actions.
Is it safe to use apps like Clean Master?
Using such apps carries certain risks. Many of them contain aggressive advertising, collect user data, or operate ineffectively by creating the appearance of activity. It’s safer to use built-in Android tools or proven utilities from well-known vendors such as Google or Avast.