Cleaning Android of unnecessary files: 7 proven ways to free up memory

Does your smartphone start to slow down, heat up, and discharge faster over time? The reason in 90% of cases is accumulated digital garbage: application caches, remnants of deleted apps, duplicate photos and temporary system files. Even on new devices with Android Over time, does it start to slow down, heat up and discharge faster? The reason in 90% of cases is accumulated digital garbage: application caches, remnants of deleted apps, duplicate photos and temporary system files. Even on new devices with 128 GB of memory users are faced with a lack of space due to invisible space hogs.

Many people mistakenly believe that periodically deleting photos or emptying the trash is enough. In fact, system junk occupies up to 30% of memory, and some applications (for example, instant messengers or social networks) can store gigabytes of unnecessary data in the background. This article will help not only free up space, but also increase phone performance by 40-60% due to proper cleaning - without the risk of deleting important files or disrupting the system.

1. Built-in Android tools: what you can delete safely

Modern versions Android (starting from Android 9 Pie) have built-in cleaning utilities that safely delete temporary files. These tools are integrated into the system and do not require superuser rights (root). The main advantage is that they do not affect critical data, unlike third-party “cleaners.”

To use the built-in cleaning:

1. Go to Settings → Storage (on some devices Memory or Device and memory).
2. Select item Storage & Performance or Free up space (the name depends on the manufacturer).
3. Wait for the analysis - the system will show categories of files that can be deleted: application cache, downloads, duplicates, etc.
4. Tick unnecessary categories and click Clear.

Pay special attention to the section Application cache. Temporary data is stored here, which speeds up the operation of apps, but over time grows to several gigabytes. For example, YouTube can cache up to 500 MB of video, and Google Maps up to 1 GB of cards. applications: they will simply reload the necessary data the next time they start.

2. Manual removal of garbage: where to look for hidden ones. files

Built-in tools do not always cope with deep cleaning. Many files remain invisible to the standard analyzer, but take up precious space. Let's consider the key folders that are worth checking manually.

To access the file system, use any file manager (for example, Files by Google, Solid Explorer or built-in My file on Samsung).The main "junk" folders:

• 📁 /storage/emulated/0/Download - all downloads from browsers and instant messengers are accumulated here. Often users forget to delete APK installers (weighing 50-200 MB) or archives.
• 🗑️ /storage/emulated/0/Android/data — cache and application data. Folders with names like com.whatsapp or com.facebook.katana can weigh several gigabytes.
• 📸 /storage/emulated/0/DCIM/.thumbnails — thumbnails of photos and videos. Sometimes up to 1 GB of unnecessary previews are stored here.
• 🔄 /storage/emulated/0/Android/obb — game files. (for example Genshin Impact or Call of Duty Mobile) can take up to 10 GB even after deleting the game itself.

Before deleting files from a folder Android/data, make sure that you do not need the application to which they belong. For example, deleting the contents of the folder. com.netflix.mediaclient will lead to the loss of downloaded series. For safe cleaning:

1. Open the application settings in Settings → Applications.
2. Select the desired application and click Storage.
3. Tap Clear cache i Delete data (attention: this will reset all app settings!).

3. Clearing cache and application data: what can be deleted

Application caches are temporary files that are created to speed up the operation of apps. For example, Instagram caches stories and photos, and Google Chrome web pages. Over time, the cache grows and can occupy up to 5-10 GB. However, not all data can be deleted without consequences. data-i="104">Let's take a look at what is safe to clean and what is not:

Let's take a look at what is safe to clean and what is not:

Data type	Is it possible to delete	Consequences	Example applications
Cache	✅ Yes	The application will take longer to load the next time you launch it	YouTube, TikTok, Google Maps
Application data	⚠️ Partially	Reset all settings, exit account	WhatsApp, VK, Telegram
OBB files	✅ Yes, if the game is deleted	Space is freed up, but the game will have to be downloaded again	Genshin Impact, PUBG Mobile
APK files	✅ Yes, if the application installed	Cannot be reinstalled without the Internet	Any installers from APKMirror or RuStore

To mass clear the cache of all applications:

1. Go to Settings → Applications.
2. Tap on the three dots in the upper right corner and select Sort by size.
3. Open applications with the largest cache (usually instant messengers, browsers and social networks).
4. Click Storage → Clear cache.

What happens if you clear WhatsApp data?

When clearing data WhatsApp (not cache!) you will lose all correspondence, media files and settings The application will require. re-registration by phone number. However, if you have backup enabled in Google Drive, the correspondence can be restored the next time you log in.

4. Removing duplicates and unnecessary media files

Photos and videos take up the lion's share of memory on a smartphone. media files are duplicates, blurry pictures or screenshots that have long lost their relevance. For example, messengers automatically save all received images to the gallery, even if you did not open them.

To find and remove duplicates:

• 🔍 Use specialized applications:
  • Files by Google (tab Cleaning → Duplicate files)
  • Duplicate Files Fixer (allows you to search for duplicates by content, not by name)
  • Gallery Doctor (analyzes similar photos and suggests leaving the best version)
• 📂 Check the folders:
  • DCIM/Screenshots — screenshots (often there are hundreds of unnecessary pictures)
  • Pictures/Telegram or WhatsApp Media —automatically saved media from chats
  • Movies/Camera — videos taken on the phone (especially heavy files in 4K)

Tip for owners Google Photos: enable the function Free up space in the application settings. It automatically deletes photos from your device that are already uploaded to the cloud (provided you have enough space in Google Account).

Delete screenshots older than 3 months

Check messenger folders for unnecessary media

Clear the "Downloads" folder from old ones files

Transfer important photos to the cloud or to a PC

Delete blurry or unsuccessful pictures-->

5. Optimizing Android: disabling unnecessary processes

Even after cleaning the files, the smartphone may slow down due to background processes. Many applications continue to run hidden. mode, consuming RAM and battery power. For example, Facebook and TikTok are known for running up to 10 background services simultaneously.

How to reduce the load on the system:

• 🛑 Disable autostart applications:
  • On Xiaomi: Settings → Applications → Autorun management
  • On Samsung: Settings → Device care → Autorun
  • On clean Android: use Greenify (requires root or ADB)
• 🔄 Limit background activity:
  • In the settings of each application (Settings → Applications → [name] → Battery) select Limited mode.
  • For Android 12+ enable Adaptive battery optimization in Settings → Battery.
• 🗑️ Uninstall or disable system applications (requires caution!):
  • Use adb shell pm uninstall -k --user 0 package name to remove built-in apps (for example com.android.browser for a standard browser).
  • A list of packages can be obtained command adb shell pm list packages.

For advanced users: if you have rights rootuse Titanium Backup to freeze unnecessary system processes. However, be careful - disabling critical services (for example, com.android.phone) can lead to network loss.

6. Reset to factory settings: when you really need it

If all the previous methods did not help, and the phone is still slow, the last chance is hard reset (reset to factory settings). This is a radical method that deletes ALL data from the device, including applications, settings and files. Use it only in extreme cases, for example:

• 🐢 The phone has become unbearably slow even after cleaning.
• 🦠 Suspicion of a virus or malware that is not removed by antiviruses.
• 🔄 You are going to sell or transfer the device to another person.

How to reset correctly:

1. Make a backup copy of important data:
   • Photos and videos - in Google Photos or on a PC.
   • Contacts - synchronize with Google Account.
   • Messages - export via SMS Backup & Restore.

Go to Settings → System → Reset settings (on some devices Restore and reset).

Select Delete all data (reset to factory settings).

Confirm the action and wait for the reboot (it may take 5-15 minutes).

What to do if the phone does not turn on after the reset?

If after the reset the device is stuck on the logo or does not turn on, try:

1. 20-30 seconds for a forced reboot.

2. Go to Recovery Mode (usually the button Power + Volume up) and select Wipe data/factory reset again.

3. If nothing helps, you need to flash it through Fastboot or a service center.

After the reset:

• Do not restore all applications at once - install only what is necessary.
• Disable automatic synchronization of media files from messengers.
• Clear the cache regularly (once every 1-2 weeks).

7. Prevention: how to prevent memory clogging

The best way to deal with garbage is to prevent it from accumulating. These habits will help keep your phone clean:

• 📱 Automatic cleaning:
  • Set up weekly cache cleaning ( Files by Google weekly cache clearing (Settings → Memory cleaning → Scheduler).
  • Enable function Adaptive storage in Android 11+ (Settings → Storage → Storage settings).
• 🚫 Application installation control:
  • Delete unused apps once a month (use Settings → Applications → Unused automatic photo upload to Settings → Applications → Unused).
  • Before installing, check the reviews of the application - some apps (for example, Chinese launchers) install hidden services.
• ☁️ Cloud storage:
  • Set up automatic photo uploading to Google Photos or Yandex.Disk.
  • Use Dropbox or Mega for backup documents.
• 🔋 Battery optimization:
  • Enable Adaptive battery in the power settings.
  • Limit background activity for applications that you rarely use.

For devices with microSD: transfer some applications to the memory card. However, remember that this may slow down their operation if the card is class UHS-I or slower. To transfer the application:

1. Open Settings → Applications.
2. Select an application and tap Storage.
3. Click Edit and select Map memory.

FAQ: Frequently asked questions about cleaning Android

❓ Is it possible? clear the cache of all applications at once?

Yes, but this is not always advisable. Clearing the cache in large quantities will result in all applications downloading data again the next time you launch, which will increase traffic consumption and temporarily slow down the phone. It is better to clear the cache selectively - for the most “heavy” applications (messengers, browsers, games).

❓ Why after? When cleaning, the memory quickly fills up again?

This happens due to:

1. Background processes —many applications (for example, Facebook or TikTok) constantly cache data.
2. Automatic downloads — messengers save media files from chats to the gallery.
3. System updates — Android creates backup copies before updates, which are not always deleted.

Solution: disable auto-loading of media in messenger settings and check the folder regularly Download.

❓ Is it safe to use "cleaners" like Clean Master?

With caution. Many "optimizers" (for example, Clean Master, CCleaner) not only clear the cache, but also:

• Show false warnings about "critical errors".
• Run background processes that themselves consume resources.
• Can delete useful system files (for example, dalvik-cache).

It is better to use built-in tools Android or proven applications like Files by Google.

❓ How to clear memory if the phone does not turn on?

If the device does not respond to the power button:

1. Connect the phone to the PC and check if it is detected as a drive (sometimes a forced reboot helps - press for 10-15 seconds). data-i="301">To completely clear the Power + Volume Down for 10-15 seconds).
2. If the phone turns on but hangs on the logo, go to Recovery Mode (the combination of buttons depends on the model) and select Wipe cache partition.
3. For complete cleaning Recovery select Wipe data/factory reset (all data will be deleted!).

If all else fails, you will need to flash the firmware via Fastboot or contact a service center.

❓ Why did some applications stop working after cleaning?

This happens if you deleted not only the cache, but also application dataIn this case:

• The app may require re-authorization. (for example, WhatsApp or VK).
• Settings will be reset to factory settings (for example, Spotify downloaded playlists will disappear).
• Some functions may not be available until reinstallation (for example, progress in games will be lost).

Solution: reinstall the problematic application or restore data from a backup (if one was created).