Over time, any, even the most powerful smartphone based on the operating system Androidbegins to work slower. This is an inevitable process of accumulation of digital “garbage”: temporary files, remnants of deleted applications, social network caches and duplicate photos. Users often notice that the device begins to slow down when opening a menu, and notifications about low memory appear more and more often. However, it’s too early to panic: in most cases, drastic measures like buying a new gadget are not required.
Proper system cleaning can return your device to its former agility and free up several gigabytes of usable space. It's important to understand the difference between safely clearing temporary data and deleting critical system files that could render your phone unusable. In this guide, we will look at proven optimization methods that are suitable for both old budget models and modern flagships.
We will consider both built-in Google tools and third-party utilities, as well as manual methods for deleting data. You'll learn why deleting the cache doesn't erase your personal photos, how to find hidden junk folders, and when it's really worth doing a hard reset. The correct approach to maintenance file system will extend the life of your battery and improve the responsiveness of the interface.
Using the built-in Google Files tool
The safest and recommended way to start cleaning is to use the standard application that comes pre-installed on your device. most modern smartphones. The utility Files by Google can automatically analyze the contents of memory and suggest files for deletion. The algorithm of the app is simple: it scans the storage, identifies duplicates, memes from messengers and applications that have not been used for a long time.
To start the process, just open the application and go to the “Cleaning” tab. The system will offer to delete temporary files that take up space but do not provide any value to the user. For example, a cache of photo thumbnails or old installation packages .apkthat remained after updating apps. Clicking the clear button in this section is absolutely safe for personal data.
Particular attention should be paid to the “Delete downloaded files” section, where documents from browsers and attachments from mail often accumulate. Built-in analyzer groups them by type, allowing you to quickly select the unnecessary ones. If you haven’t cleaned your phone for a long time, here you can free up from 500 MB to several gigabytes of space in a couple of clicks.
⚠️ Attention: Before mass deleting files from the “Downloads” folder, carefully review their contents. Sometimes there may be important tickets, receipts or instructions in PDF format that you downloaded six months ago and forgot.
Enable the "Auto Clean" function in the Files application settings so that the phone regularly deletes temporary files without your participation.
Manually clearing cache and data applications
The main consumers of memory on a smartphone are social networks and instant messengers. Applications like Telegram, VK or Instagram save every picture and video you watch to the internal memory for quick loading in the future. Over time, this cache can grow to gigantic proportions, taking up 5-10 GB of space. Clearing this data does not delete your correspondence or account, but only resets temporary files.
To perform a deep clean of a specific application, you need to go to the settings of your smartphone. The path may differ slightly depending on the manufacturer's shell, but the general algorithm is the same: go to Settings → Applications → Manage applications. Select the heaviest app from the list, for example, YouTube or TikTok.
In the menu of the selected application, find the “Storage” section. Here you will see two buttons: “Clear cache” and “Erase data”. The first deletes temporary files, the second resets the application to the “as after installation” state, deleting logins and settings. To free up space, use only clearing the cache.
- 🗑️ The Chrome browser cache can take up to 1 GB, if you actively surf the Internet, you can clear it regularly.
- 📸 The gallery creates thumbnails for all photos, the file
.thumbnailssometimes bloats up to incredible sizes. - 💬 Messengers store media files in separate folders, which are best cleaned through the settings of the application itself.
- 🎮 Games often store a cache of levels and textures, which is useless if you have not launched the game for several months.
☑️ Checking heavy applications
Delete duplicates and unnecessary media files
Photos and videos are the most voluminous content on any smartphone. Often, users take a series of ten identical pictures to choose the best one, and forget to delete the rest. Also a problem are screenshots that are taken automatically or by mistake, and then lie in the gallery as dead weight for years.
To find duplicates, you can use specialized functions in the gallery or third-party optimizer applications. Many modern skins, such as MIUI or OneUIhave a built-in “Similar Photos” tool that groups pictures and offers to delete unnecessary copies. This allows you to quickly get rid of hundreds of identical images.
Don't forget about the folder DCIM i Screenshots. High-definition videos 4K take up enormous space: one minute of recording can weigh about 400 MB. If you do not need to store the videos on your phone, transfer them to your computer or cloud storage and delete the originals.
| File type | Average size | Recommendation |
|---|---|---|
| Photo (JPEG) | 3-5 MB | Store in the cloud, remove blurry frames |
| Video (1080p) | 100-150 MB/min | Transfer to PC immediately after shooting |
| Screenshot | 1-2 MB | Delete after using information |
| Audio (MP3) | 5-10 MB | Use streaming services instead of storage |
Cleaning the downloads folder and system junk
The Download (Downloads) folder often turns into a digital landfill. This includes installation files for applications that have been installed for a long time, presentations that have been opened once, and random files from the Internet. Regular revision of this directory is a mandatory item for smartphone maintenance.
Go to any file manager and open the root downloads folder. Sort files by date or size. Remove all installation packages with extension .apkunless you plan to transfer them to another device. Also, feel free to delete files with extension .tmp or without an extension, which are often remnants of incorrect downloads.
System garbage, such as error logs and crash reports, is usually hidden from the user's eyes, but some file managers with advanced rights allow you to see them too. However, be careful: manually deleting files from system folders may cause applications to malfunction. Android/data manually can lead to application failures.
⚠️ Attention: Never delete files from a folder
Android/obbif you want to save progress in heavy games. Deleting this data will result in the need to download gigabytes of content again.
What is a .nomedia file?
This file tells the system not to scan the folder for media files. If you delete it from the music folder, your tracks may appear in the player's general feed, which is sometimes convenient, and sometimes creates chaos.
Uninstalling unused applications and widgets
Each installed application, even if you do not use it, takes up space not only with its files, but also with service data. Moreover, many apps have background services that consume RAM and battery power, slowing down the entire device.
Audit your installed apps. Go to settings and sort the list by last used date. If you haven't opened the app in more than three months, you probably don't need it. Remove it without regret - at any time the app can be downloaded again from Google Play.
Pay attention to the pre-installed software (bloatware). Smartphone manufacturers often install their own versions of browsers, stores and services that you will never use. If you do not have superuser rights (root), such applications can at least be “Disabled” in the settings, which will hide them and stop background processes.
Don't forget about widgets on your home screen. Beautiful clocks, weather forecasts and news feeds constantly update data, loading the processor and network. Removing unnecessary widgets is an easy way to lighten up the system a little and increase battery life.
Disabling system applications through settings is a safe alternative to deleting, which frees up RAM but does not delete firmware files.
Radical measures: Reset to factory settings
If none of the The above methods did not help, and the phone continues to work unstable, the last resort remains - a complete data reset (Factory Reset). This procedure returns the device to the state it was in when purchased, completely erasing all user information.
Before performing a reset, it is critical to back up all contacts, photos, and documents. Data can be saved to your account Google, to a memory card or transferred to a computer. After the reset, it will be impossible to restore information without a backup.
To start the procedure, go to Settings → System → Reset settings. Select "Erase all data (factory reset)". The process will take from 5 to 15 minutes, after which the phone will reboot and require initial setup as new.
⚠️ Attention: Make sure the battery level is at least 50% before starting the reset. If the phone turns off during the formatting process, this can lead to software damage and a “bricked” device.
Why do a reset?
A full reset deletes not only user files, but also errors in the system registry that have accumulated over the years, database fragmentation and conflicting settings, which often gives a second life to old smartphones.
Prevention and good habits
In order not to return to the issue of cleaning every two weeks, it is worth developing several useful habits. Regularity is the key to a clean system. Set aside 10 minutes once a month to check your downloads folder and delete unnecessary screenshots.
Set up automatic synchronization of photos with the cloud (Google Photos, Yandex.Disk). Turn on the Free Up Space feature, which automatically removes pictures already stored in the cloud from your device. This will allow you to store thousands of photos without taking up a single byte of internal memory.
Avoid installing dubious cleaning applications that promise to “speed up your phone 10 times.” Often such apps themselves are a source of advertising and unnecessary garbage. Built-in tools Android are quite enough to maintain system hygiene in order.
Use the Memory Saver or Do Not Disturb mode in the developer settings to limit the background activity of applications that you rarely use.
Is it safe to delete the .thumbnails folder in gallery?
Yes, it is safe to delete this folder. It contains thumbnails of your photos for quick display in the gallery. After deleting, the system will automatically create it again the next time you open the gallery, but this may take a little time and processor resources.
Why, after clearing the cache, the space was freed up, and then taken up again?
The cache is temporary data necessary for the fast operation of applications. When you open your browser or social network again, they download and save images and scripts again. This is normal system behavior aimed at saving traffic and speeding up loading.
Do you need to close applications in the multitasking menu?
No, forcibly closing applications through the multitasking menu on modern versions of Android more often harms than helps. The system itself effectively manages RAM. Constantly restarting applications increases battery consumption and processor load.
How to clear the DNS cache on Android?
To clear the DNS cache, you can use airplane mode: turn it on for 10 seconds and turn it off. Or, go to your Chrome browser settings and click Clear History, selecting Cookies & Site Data.
Can wiping my phone delete my WhatsApp messages?
If you use the Clear Cache option in the app settings, no, the messages will remain. If you click “Erase data” or delete the application itself without a preliminary backup, yes, the correspondence will be lost.