Modern smartphones have huge amounts of built-in memory, but even 512 GB or 1 TB can run out at the most inopportune moment. The operating system Android over time becomes overgrown with temporary files, which not only take up space, but can also slow down the device. Users often encounter low-space notifications that prevent them from installing updates or downloading new apps.
There are many ways to free up precious megabytes, from simple built-in tools to advanced cleaning methods. In this article we will analyze how to delete unnecessary files from an Android phonewithout damaging important data or system settings. You will learn to distinguish the necessary cache from useless garbage.
You should not immediately resort to radical measures like a complete reset. Competent and regular cleaning of the digital space allows you to maintain the performance of your gadget at a high level for years. Let's start by analyzing what exactly is taking up space in your device.
Analyzing memory occupancy and searching for “heavyweights”
Before you start deleting, you need to understand what exactly is occupied by the memory of your smartphone. The operating system Android provides built-in data visualization tools that allow you to see the distribution of space between applications, images and system files. It often turns out that the lion's share of the space is occupied not by photos, but by the cache of messengers or forgotten downloads.
To get to the storage menu, go to Settings → Memory or Settings → Device maintenance → Memory (the path may differ depending on the model, for example, Samsung, Xiaomi or Pixel). Here you will see a color chart where each sector is responsible for a specific type of content. This is the first step to understanding how how to clear memory on Android effectively.
Pay attention to the “Applications” section. Often it is social networks and instant messengers that accumulate gigabytes of data. For example, Telegram or WhatsApp can take up 10-20 GB if you do not set up automatic media file cleaning.
⚠️ Attention: Do not delete files from system folders with names like “Android”, “data” or “obb” unless you are 100% sure of their destination. This can lead to incorrect operation of applications or the operating system itself.
Analysis shows that users often ignore the “Downloads” folder, where APK installation files that have not been needed for a long time can lie for years. It’s also worth checking the “Trash” section in the gallery, as deleted photos are often stored there for another 30 days, continuing to take up space.
Clearing application caches and system garbage
Caches are temporary files that applications create to speed up their work. For example, the browser saves copies of visited pages, and maps save fragments of maps of the area. Over time, this application cache grows and becomes useless ballast. Clearing the cache is a safe way to free up space as it does not delete your personal data, logins or passwords.
To manually clear it, go to Settings → Applications. Select an application that takes up a lot of space (for example YouTube or Instagram), and click "Storage". There you will see a “Clear cache” button. Do not confuse it with the “Clear data” button, which will reset the application to its state immediately after installation.
Many manufacturers add their own utilities for quick cleaning. On devices Xiaomi this is the “Security” application, on Samsung it is “Device Maintenance”. They allow you (in one click) to delete temporary system and advertising files.
☑️ Safe cleaning checklist
There is a myth that the cache needs to be cleared constantly. In fact, after cleaning, applications will need to re-create temporary files, which may even increase battery consumption slightly in the first minutes of operation. Do this only when the memory is really full.
The system cache deserves special attention, which can be cleared through the recovery menu (Recovery Mode), but this requires more in-depth knowledge and is not recommended for ordinary users unless absolutely necessary.
Removing duplicate photos and video files
Multimedia is the most voluminous type of data on any smartphone. Often, the gallery accumulates hundreds of identical pictures taken in burst mode, or screenshots that are no longer relevant. Removing duplicates allows you to instantly free up several gigabytes.
Modern versions Android (starting from 11-12 versions) and shells from manufacturers (One UI, MIUI) have built-in tools for searching for similar images. In the Gallery or Google Photos application, there is often a “Recommendations” or “Tools” section, where the system itself suggests deleting blurry pictures or large videos.
If there is no built-in tool, you can use the file manager. Sort files by size to find the heaviest videos. Often forgotten videos in 4K resolution take up more space than thousands of documents.
| File type | Average size (example) | Where to look | Can I delete |
|---|---|---|---|
| Photo (JPEG) | 3-5 MB | DCIM/Camera | Yes, if not needed |
| Video (1080p) | 100-200 MB | DCIM/Camera | Yes, after viewing |
| Whatsapp cache | 1-50 GB | Android/media | Yes, through the app settings |
| Offline cards | 500 MB - 2 GB | Google Maps | Yes, if not in traveling |
Don’t forget to check the “Screenshots” folder. We often take screenshots so we don't forget information, but we rarely look back at them. The “sheet” of screenshots accumulated over a year can weigh a lot.
Use cloud services (Google Photos, Yandex Drive) with the “free up space” function. They will automatically delete from the phone those photos that have already been successfully uploaded to the cloud.
Working with instant messengers: Telegram and WhatsApp
Messengers have turned into the main hogs of memory. Telegram and WhatsApp automatically download all received photos and videos into memory devices. Without proper settings, correspondence can “eat up” 5-10 GB of memory in a month.
In Telegram the situation is resolved in the most elegant way. Go to Settings → Data and memory → Memory usage. Here you can see the total cache size. Click Clear Cache. The most important thing is to set the Auto Delete Media slider to 3 days or 1 week. Now the application will itself delete old files, storing them only in the cloud, and they will be downloaded again only when viewed again.
B WhatsApp the mechanism is slightly different. Go to Settings → Data and storage → Storage management. Here you can sort chats by space and remove media from specific conversations. It is also useful to disable autosave to the gallery so that files are not duplicated in the system folder.
⚠️ Attention: Before clearing messengers, make sure that important documents or photos are saved in another location. After clearing the cache in messengers, the files disappear from the device, but remain available in the chat (unless they are deleted by the sender).
Regularly checking the “Documents” tabs inside messengers is also useful. Often, heavy PDF files or installers sent a month ago remain there.
Why does Telegram take up so much space?
Telegram stores all viewed media files in a local cache for quick access. Unlike WhatsApp, which stores the history on the phone (or in a backup), Telegram keeps everything in the cloud, and only a temporary copy on the phone. It is this copy that needs to be cleaned.
Removing unused applications and games
Applications that you do not use are not only occupied space, but also a potential security threat, as well as a source of background load on the battery. Review your desktop and menu. If you have not opened a game or utility for the last 3 months, most likely you do not need it.
Removal is carried out via Settings → Applications or long press on the icon on the desktop. However, some system applications cannot be removed using standard means. For them, you can use the “Disable” command, which will hide them and stop processes, freeing up some resources.
Pay attention to games. Modern mobile games with high graphics can weigh 2-5 GB each. If you have completed the game and do not plan to return, feel free to delete it. Progress data is often saved in the cloud (Google Play Games), so you can start over on any device.
Three-month rule: if an application has not been used for 90 days, you should delete it. This frees up an average of 500 MB - 2 GB per smartphone.
Also check in-app subscriptions. We often pay for services that we no longer use. Unsubscribing will not delete the application, but will stop financial losses.
Using file managers for deep cleaning
For advanced users, the best tool is a file manager, for example Files by Google, Solid Explorer or the built-in “My Files”. They allow you to see the real folder structure and find hidden files that are not visible in the standard gallery.
Using the file manager, you can find folders with names like “Temp”, “Cache”, “Log”. The folder Android/data stores application data, but you need to touch it with caution. However, folders like Download, Bluetooth (for files received via Bluetooth) often contain garbage.
Searching by file extension is a powerful tool. Search for ".apk" to find application installation files. After installing the app, these files are no longer needed and can be safely deleted. The same applies to “.tmp” files.
⚠️ Attention: Interfaces and folder names may change with updates to the Android version or the manufacturer's shell. Always check the official documentation for your device if you are unsure about the folder assignment.
Use the “Sort by Size” function in the file manager. This will immediately bring up the largest files, among which there are often forgotten films or archives.
Frequently asked questions (FAQ)
Is it safe to use cleaning applications (Clean Master and analogues)?
Modern versions Android they themselves effectively manage memory. Third-party cleaners often work like antiviruses—they create a problem in order to solve it by pushing ads or collecting data. The built-in tools are usually sufficient.
What happens if you delete the Android folder?
Complete deletion of the folder Android will lead to resetting the settings of all applications, loss of saved progress in games (if there is no cloud) and possible unstable operation of the system. You can only delete the contents of cache subfolders inside it, and then selectively.
Why does the memory fill up again immediately after clearing?
This is normal. Applications immediately begin creating new temporary files for their work. The autosave function in instant messengers or photo synchronization may also work. Check your startup settings.
How to clear “Other” in the storage?
The “Other” section usually contains application cache, system logs and files that the system cannot classify. The best way to clear it is to clear the cache of specific heavy applications or reset the phone to factory settings (with a preliminary backup).