Why a smartphone starts to slow down and how to restore its speed
Modern smartphone users are often faced with a situation where a once-fast gadget begins to irritatingly freeze. This is not because the processor has become outdated in a couple of years, but because the storage is full. The system cannot efficiently process requests when there is critically little free space left on the internal disk for temporary files. Android-the gadget begins to freeze annoyingly. This is not because the processor has become outdated in a couple of years, but because the storage is full. The system cannot efficiently process requests when there is critically little free space left on the internal disk for temporary files.
Many people mistakenly believe that the solution to the problem lies only in buying a new model or memory card. However, competent optimization existing space can work wonders. Cleaning your phone of “digital junk” is not just about deleting old photos, it is a comprehensive approach to data management, which we will look at below.
You don’t need paid subscriptions or complex technical knowledge. It is enough to understand the structure of the file system of your device and know which folders can be touched and which are better left alone.
Storage analysis: searching for the heaviest files
Before deleting anything, you need to understand what exactly is taking up space. Modern versions Android 11, Android 12 and newer have a built-in powerful analytical tool. It allows you to visualize memory and immediately shows the categories of files that weigh the most.
Usually instant messengers and social networks become the main consumers of space. Applications like Telegram or WhatsApp automatically save all received images and videos into hidden folders, creating gigabytes of duplicates. Also, a significant share is occupied by browser cache and remnants of deleted applications.
To start the analysis, go to Settings → Memory → Free up space. The system will prompt you to delete unused applications or large files. Do not ignore this stage, as it gives an initial idea of the “landscape” of your storage.
⚠️ Attention: Before mass deleting files from a folder Download be sure to check their contents. Often there are important documents, receipts or installation files that you may need in the future.
Manually clearing application caches without third-party software
Cache is temporary data that applications save to speed up their work. Over time, these files become outdated, but continue to take up space. The most effective strategy is targeted cleaning of the most “gluttonous” apps, and not total cleaning of everything.
Go to the section Settings → Applications and sort the list by size. You might be surprised to find that your browser or food delivery app can take up several gigabytes. Click on the desired application, select the item Storage and use the button Clear cache.
It is important to distinguish between the “Clear cache” and “Clear data” buttons. The second option will reset the application to its factory state, deleting your logins, settings and local databases. Use it only if the application is not working correctly or you want to reset it completely.
- 📱 Social networks: Vkontakte and Instagram accumulate gigantic volumes of viewed pictures and videos.
- 🌐 Browsers: Chrome and Yandex Browser store history and page thumbnails for months of use.
- 🎮 Games: Even remote games can leave resource files (map cache, textures) in the system.
⚠️ Attention: Menu interfaces may differ depending on the manufacturer’s shell (MIUI, OneUI, ColorOS). If you do not find the exact path, use the search within the settings for the word “Cache” or “Memory.”
Use the Sleep mode function in the battery settings for rarely used applications. This will not only save battery, but will also limit background activity, preventing excess junk from accumulating.
Removing duplicate photos and videos from the gallery
Media files are the most obvious candidate for deletion, but we often forget about hidden copies. When editing photos, many apps save the new version without deleting the original. In addition, screenshots and pictures downloaded from the Internet are often duplicated in different folders.
To find duplicates, you can use the built-in Google Photos tool if it is installed on your device. Go to the Library → Tools tab and select the item to remove duplicates. The system will automatically find identical pictures and offer to delete unnecessary ones.
It is also worth paying attention to the folder .thumbnails (hidden), where the system stores thumbnails for the gallery. Sometimes this folder grows to obscene sizes. To clean it, you may need a file manager with access to hidden files, for example Total Commander or the built-in “My Files”.
☑️ Checking the media library
Cleaning messengers: Telegram and WhatsApp
Messengers are the main culprits of low memory for most users. They save every sent and received photo, video and voice message in the phone's memory, even if you have already viewed them in a chat.
In Telegram the situation is resolved in the most elegant way. Go to Settings → Data and memory → Memory usage. Here you can click the button Clear cache. The most important thing is to set the Auto Delete Media slider to 3 days or 1 week. This will allow the application to store files only in the cloud, freeing up gigabytes on the device without losing access to the chat history.
In WhatsApp the process is a little more complicated. You need to go to Settings → Data and storage → Storage management. Here you can see the chats that take up the most space and delete media files selectively. It is also recommended to disable autosaving to the gallery in the chat settings so that photos are not duplicated in the general camera feed.
What is the WhatsApp Images folder?
This is a hidden directory where the messenger puts all the pictures. If you delete files from there manually through Explorer, they will also disappear from the chat if they were not saved to the cloud. It’s safer to delete them through the settings of the application itself.
System tools and developer mode
In the depths of Android settings there are functions that not everyone knows about. For example, developer mode allows you not only to debug applications, but also to forcibly control the cache size. However, it must be used with caution.
You can activate the mode by clicking 7 times on the build number in the section About the phone. After this, a new item will appear in the settings menu For developers. Scroll down to the Applications section. There you can find an option to limit background processes, which indirectly affects the speed of accumulation of temporary files.
It is also worth checking for large files through a standard file manager. Look for files with the extension .log or .tmp in the system root or in application folders. Deleting them is safe, since these are technical logs that have already fulfilled their function.
| File type | Where is it located | Can it be deleted? | Risk of data loss |
|---|---|---|---|
| Cache applications | Settings → Applications | Yes | Low (reset application settings) |
| Downloads | Download folder | Selective | Medium (you can delete the desired file) |
| Thumbnails (.thumbnails) | DCIM/.thumbnails | Yes | Low (the gallery will re-create them) |
| System logs (.log) | Root folder | Yes | Absent |
⚠️ Attention: Do not delete files from system foldersAndroid/dataorAndroid/obbmanually if you are not 100% sure of their purpose. This can lead to installed games and apps not working.
Prevention: how to maintain cleanliness in the future
One-time cleaning gives a temporary effect. To keep your phone fast for years to come, you need to develop digital hygiene habits. A regular storage audit once a month will only take 5 minutes, but will save hours of hassle in the future.
Use cloud storage services such as Google Drive or Yandex.Disk, for archiving old photos and documents. Set up automatic downloading of media files, and then feel free to delete them from the device. This will turn your phone into a data access terminal, not a warehouse.
When installing new applications, pay attention to their size and resolutions. Many apps require access to all files on the device for no good reason. Restricting access rights can prevent the hidden accumulation of advertising garbage.
Regularly clearing the messenger cache and transferring photos to the cloud are the two most effective actions for maintaining Android performance throughout the life of the device.
Is it safe to use cleaning applications (Clean Master and analogues)?
Most Third-party cleaners work aggressively and often do more harm than good. They can delete necessary caches, force applications to download data again (wasting data and battery), and also show intrusive advertising. Built-in Android tools are quite enough for safe cleaning.
Why is space freed up after cleaning, but quickly runs out again?
This is normal system behavior. Android creates a cache to make applications run faster. If the space runs out too quickly (in a couple of days), check your messenger settings for auto-saving media or the presence of applications running in the background and downloading data.
Is it possible to delete the entire Android folder?
Absolutely not. Deleting the folder Android will lead to resetting all application settings, loss of game saves and possible system instability. You can only delete the contents of subfolders of specific deleted applications or the cache inside them through the settings.
How to clear the memory if the phone is frozen and does not enter the menu?
Try entering Recovery mode (usually holding down the power and volume up buttons when turning it on) and selecting Wipe Cache Partition. This will clear the system cache without deleting personal data. If this does not help, you will need a full reset to factory settings.