Modern Android devices inevitably slow down over time, responding to user actions with a delay. The reason for this is not only the aging of hardware, but also the accumulation of a huge amount of temporary data. The system saves logs, application caches and residual files that take up valuable space in the internal memory.
Regular cleaning of the device allows you to return to its former smooth operation and make room for new photos or apps. Many users ignore this process until they receive a low space message, which often results in critical crashes. A competent approach to storage management extends the life of your phone without the need to purchase a new model.
In this article we will look at effective methods for removing digital junk, from built-in tools to advanced utilities. You will learn which folders can be safely deleted and which ones should absolutely not be touched. We will also look at the nuances of cleaning RAM so that your gadget works as quickly as possible.
Using built-in Android cleaning tools
Operating system developers have introduced powerful tools for device maintenance directly into the settings. The first step is to refer to section Settings → Device maintenance → Memory. Here the system automatically analyzes the occupied volume and offers to delete unnecessary files with one click. This method is the safest for beginners, as it eliminates the risk of deleting important system data.
However, automatic analysis does not always find deeply hidden garbage. In the storage menu, you can often see a detailed breakdown into categories: images, videos, audio and documents. By clicking on a specific category, you can manually select and delete old screenshots or downloaded files that are no longer needed. Manual sorting allows you to be sure that you are not deleting anything unnecessary by mistake.
Special attention should be paid to the “Downloads” section or Downloads. Installation files APK from updated apps that are no longer needed by the system often end up here. Removing them is safe and instantly frees up hundreds of megabytes. Remember to check this directory once a month to maintain order.
⚠️ Attention: Before deleting files from the folder Android/data make sure that they do not contain saves of your games or settings of specific applications. Deleting this folder may reset progress in some apps.
Turn on Smart Storage in Settings to have your phone automatically delete old backups and duplicate photos.
Clear application cache and system data
Caches are temporary files that applications create to speed up their work. Over time, this cache grows to gigantic proportions, especially in social networks and instant messengers. To clear it, go to Settings → Applications and select the heaviest application from the list. Inside the application menu, find the “Storage” item and press the button Clear cache.
It is important not to confuse clearing the cache with resetting data. If you click Clear data, the application will return to the state immediately after installation: you will lose logins, passwords and settings. Clearing the cache only affects temporary files, such as image thumbnails or downloaded parts of videos, which will be downloaded again if necessary. This is a safe procedure that can be performed regularly.
For system applications, such as Google Play Services or browser Chrome, the cache size can reach several gigabytes. Clearing them often solves problems with interface freezing. Some shells, for example MIUI or OneUI, have a deep cleaning function that finds a hidden cache of advertising identifiers.
☑️ Monthly cache clearing
If after clearing the cache the space freed up is insignificant, the problem may be in “heavy” updates of the applications themselves. Check to see if you have older versions of apps that are taking up space in the shadow storage.
Deleting duplicates and unnecessary media files
The largest amount of memory on a smartphone is usually occupied by photos and videos. Over time, the gallery accumulates unsuccessful takes, screenshots of correspondence and videos taken by mistake. To search for such files, it is convenient to use the built-in Google Photos or third-party file managers that support the search for duplicates function.
Pay attention to the folder .thumbnails, which is located in the hidden directory DCIM. It stores thumbnails of all your photos for quick display in your gallery. This folder can take up to 1-2 GB of space. It can be safely deleted, but the system will create it again over time. This is a great way to temporarily free up space before an important shoot.
- 📸 Look through the “Screenshots” album and delete images that no longer provide information value.
- 🗑️ Check the “Trash” folder in the gallery - deleted files are often stored there for another 30 days, taking up space.
- 📹 Sort videos by size and delete long videos that can be transferred to your computer or the cloud.
How to find hidden folders with junk?
Use a file manager with access to system files. Look for folders with the names of deleted applications in the root of the internal memory - they often remain after uninstalling apps.
Don't forget about voice recordings and a voice recorder. Often hours of useless noise or forgotten notes are stored there, which weigh a lot in the format WAV or M4A.
Audit and removal of unused applications
Many users install applications “just in case” or for the sake of one function, and then forget about them. Such apps not only take up space, but also run in the background, consuming RAM and battery power. Go to settings and sort the list of apps by date of last use.
If you haven't opened the application for more than 3-6 months, most likely you don't need it. Feel free to delete it. Pay special attention to the pre-installed software (Bloatware), which is often included with the phone from the manufacturer. Some of these apps cannot be removed in the standard way, but they can be disabled in the menu Settings → Applications → Disable.
| Application type | Recommended action | Risk of data loss |
|---|---|---|
| Social networks | Clear cache or delete | Low (login required) |
| Games | Delete if you don't play | High (loss progress) |
| System utilities | Do not touch without knowledge | Critical (system failure) |
| Office packages | Leave or transfer files | Medium (loss of documents) |
Before deleting messengers like WhatsApp or Telegram be sure to make a backup copy of chats. These applications store chat history and media files locally, and if you uninstall the app, the entire history may be lost forever.
Deleting an application does not always delete all of its files. Residual folders with the names of deleted apps must be searched and erased manually through the file manager.
Use of specialized cleaning utilities
If the built-in tools are not enough, third-party cleaner applications come to the rescue. The leader in this area is Files by Google, which safely finds garbage, duplicates and old files. Unlike aggressive "accelerators", this tool analyzes the context and suggests removing only what is really not needed.
There are also more powerful tools, such as SD Maid or CCleaner. They allow you to find “orphaned” files left after uninstalling apps and clear system logs. However, they must be used with caution. Excessive use of such apps can lead to the fact that the phone will start to work slower, since the system will have to re-create the necessary cache files.
⚠️ Attention: Avoid installing dubious applications with names like “Super Cleaner Boost”. Often they contain advertising, miners, or simply imitate cleaning without bringing real benefit.
When choosing a utility, be guided by reviews and the number of installations in the official store Play Market. Do not give such apps superuser rights (Root) unless you are 100% sure of their reliability.
Transferring data to a memory card and to the cloud
When the internal memory is full to capacity, the most logical solution is to transfer data. If your smartphone supports microSD cards, you can configure the camera so that new photos and videos are saved directly to external storage. To do this, go to the camera settings and select Save location → SD card.
You can also transfer existing files. In the file manager, select media folders and select the “Move” function. Please note that transferring installed applications to a memory card in modern versions Android is often limited or impossible due to security and performance requirements.
An alternative to a physical card is cloud storage. Services like Google Drive, Yandex.Disk or Dropbox allow you to free up space by uploading files to the Internet. Many galleries have a “Free up space” feature that removes photos from your phone that have already been uploaded to the cloud. This is an ideal option for those who do not want to carry unnecessary files with them.
Set up automatic synchronization of the “Camera” folder with the cloud. Then you can safely delete old photos from your phone, knowing that they are safe on the Internet.
Remember that to work with the cloud you need a stable Internet. When traffic is limited, it is better to download large amounts of data via Wi-Fi.
Frequently asked questions (FAQ)
Is it safe to delete the Android folder?
Deleting the folder completely Android is not recommended, since it stores important data applications. However, you can safely delete subfolders cache inside it or folders of remote applications. The folder Android/obb contains a cache of heavy games - if you delete it, the games may require re-downloading the data.
Why does the space quickly run out again after cleaning?
Most likely, you have activated the autosave functions in instant messengers. Check your settings Telegram and WhatsApp and disable automatic media downloading. Also, applications constantly generate a new cache during operation; this is normal system behavior.
How to clear random access memory (RAM)?
In modern versions of Android, manually clearing RAM through the multitasking menu is often useless, since the system itself manages the memory. The best way to free up RAM is to reboot your device. This will close all hung processes and refresh system services.
Is it possible to delete system applications to free up space?
Without obtaining root access you cannot delete system applications, you can only disable them. Attempts to remove them through a computer using ADB may result in the phone not working (bootloop). Disabling unnecessary Google or manufacturer services is a safer way.
Does full memory affect the speed?
Yes, critically. When the internal memory is more than 90% full, the speed of writing and reading data drops significantly. This causes severe interface lag. Always leave at least 10-15% of the memory free for the system to function correctly.