How to completely clear Android from garbage: instructions for beginners and advanced

Has your smartphone on Android started to slow down, quickly discharge, or give "Insufficient memory" errors? 90% of problems are related to the accumulation of digital garbage - remnants of deleted applications, duplicate photos, browser caches and system logs. Even new models on Snapdragon 8 Gen 3 or Dimensity 9300 after six months of use can turn into "lag machines" if you do not keep the system clean.

In this article - 7 proven ways to clean Android, from basic (suitable even for Samsung Galaxy A14 on weak hardware) to advanced (for enthusiasts with root access). We will figure out which files can be deleted without riskwhich ones should not be touched so as not to break the system. All methods have been tested on current versions Android 14 i Android 15 Developer Preview (the interface may differ slightly on custom firmware like LineageOS or ColorOS).

Spoiler: not all “cleaners” from the Play Market work honestly —some simply imitate the process, while others delete important data. We will tell you which tools are truly safe.

1. Built-in Android tools: what can be cleaned without apps. data-i="48">Starting from

Starting from Android 8 Oreo, tools for basic cleaning are integrated into the system. They will not replace deep cleaning, but will help to free up 1–3 GB of space. in 5 minutes. The main advantage is no need to install third-party applications, which themselves take up memory.

Where to look:

• 📱 Settings → Storage (on Xiaomi - "Memory", on Samsung - "Device Care") Here the system will show the distribution of memory by category: applications, multimedia, cache, "Other" (where often). garbage is hidden).
• 🧹 Cache clearing: in the same section, click "Clear cache" (not to be confused with "Clear data" - this will delete all application settings!) The cache of browsers (Chrome, Firefox) and social networks (TikTok, Instagram) can weigh up to 500 MB.
• 🗑️ "Trash" (if any): on some devices (for example Huawei or Oppo) deleted files first go to the trash can and take up space for up to 30 days. Clear it manually.

⚠️ Attention: Do not click "Clear all data" in the applications section - this is equivalent to reinstalling the app. For example, WhatsApp or Telegram all chats and media files will be deleted!

Type of garbage	Where to look	How much space does it take up	Can I delete
Application cache	Settings → Applications → [Select application] → Storage → Clear cache	From 100 MB to 1-2 GB	✅ Yes (safe)
Temporary download files	Folder Download or Downloads	From 500 MB to 5 GB	✅ Yes (check for important files)
Logs and dumps system	/data/log (visible only with root)	From 50 MB to 1 GB	⚠️ Only if you know what you are doing
Remains of deleted applications	Folders /data/app-lib or /sdcard/Android/obb	From 200 MB to 3 GB	✅ Yes (use Files by Google)

2. Cleaning applications: which ones really work

In Google Play hundreds "cleaners", but most are either useless or aggressively advertise paid functions. We tested 15 popular utilities and selected 3 of the most effective (without hidden subscriptions and viruses).

Top 3 tested applications:

• 🏆 Files by Google (from Google LLC): free, without unnecessary water, finds duplicate photos, large files and application remains. Suitable for Android 5.0+.
• 🛡️ SD Maid (requires Android 6.0+): deep cleaning, including system junk. There is a paid version with automatic cleaning. schedule.
• 🔍 CCleaner (from Piriform): a classic of the genre, but Android works worse than on a PC. Useful for clearing browser caches.

⚠️ Attention: Avoid applications like Clean Master, DU Speed Booster or 360 Security. They:

• 🚫 They launch background processes that themselves slow down the system.
• 📢 Show false warnings about "critical errors" in order to sell the premium version.
• 🔄 Useful files are often deleted (for example, cache Google Maps, which causes maps to take longer to load).

Clear cache|Delete duplicate photos|Check the "Downloads" folder|Empty Trash|Delete unused APK

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Important: No application can clean up system files without root access. If you are offered “deep kernel optimization”, this is a scam.

3. Manual garbage removal: hidden folders and files

Even after using “cleaners”, gigabytes of unnecessary data remain in the memory. data. They can be found manually through any file manager (we recommend Solid Explorer or FX File ExplorerHere 5 key placeswhere the garbage accumulates:

Where to look:

• 📁 /sdcard/Android/obb — additional game files are stored here (for example, textures for Genshin Impact or Call of Duty Mobile). After deleting a game, the folder often remains.
• 📁 /sdcard/Android/data — cache and application settings.
• 📁 /sdcard/DCIM/.thumbnails — photo and thumbnails. videos. You can safely clear them (they are regenerated automatically).
• 📁 /sdcard/Download — installation files (.apk), archives (.zip, .rar) and documents are accumulated.
• 📁 /data/local/tmp — temporary system files (visible only from root).

How to enable the display of hidden folders?

In most file managers you need to go to the settings (⚙️) and enable the "Show hidden files" option. In Solid Explorer path: ☰ → Settings → General → Show hidden filesOn some firmwares (for example, MIUI) hidden folders appear semi-transparent.

🔧 Cleaning instructions:

1. Open the file manager and go to the root folder (/sdcard or "Internal memory").
2. Find the folders from the list above. Folders of current applications (those that are currently installed) do not touch!
3. Delete unnecessary files. For example, in /sdcard/Android/obb you can safely delete. folders with the names of deleted games.
4. Folders /data or /system require root access.

4. Clearing the system cache and Dalvik-cache (for advanced)

If your smartphone has already received root access (or you are ready to get them), you can clear them system cache and Dalvik-cache - this will give a performance increase of 10-30%. But be careful: incorrect actions can lead to "briku" (breakdown) of the device.

What can be cleared:

• 🗃️ System cache (/cache): temporary update and log files are stored here. Cleaning is safe.
• 🤖 Dalvik-cache (/data/dalvik-cache): virtual machine cache Android. After cleaning, it is regenerated, but the system can work faster.
• 📜 System logs (/data/log): files with error reports. You can delete them, but they will help in diagnosing problems.

🛠️ How to clear (root required):

1. Install Root Explorer or FX File Explorer (with root support).
2. Go to folder /cache and delete all its contents.
3. For Dalvik-cache it is better to use TWRP Recovery (custom recovery): reboot into TWRP, select Advanced → Wipe Dalvik Cache.
4. Reboot device. The first launch may take up to 5 minutes - this is normal.

⚠️ Attention: If after cleaning Dalvik-cache the smartphone does not start (freezes on the logo), then you have deleted critical files. Solution:

1. Boot into TWRP Recovery.
2. Select Wipe → Advanced Wipe → Dalvik/ART Cache.
3. Reboot. If it doesn’t help, you’ll have to reflash the device.

5. Optimizing startup and background processes

Garbage is not the only reason for slowdowns. Many applications (Facebook, AliExpress, games) start when the system starts and stay hanging in the background, consuming RAM and battery power. Disabling autoloading can increase operating time by 15-20%.

How to disable autoloading:

• 📵 Without root: Use the built-in settings. On Xiaomi: Settings → Applications → Permissions → Autorun. On Samsung: Settings → Device care → Battery → Background activity.
• 🔧 With root: Install Greenify (free version) or Brevent. These applications “freeze” background processes without being deleted.

📊 Top 5 "gluttonous" applications (according to data AccuBattery):

Application	Average RAM consumption (background)	Battery consumption for 1 hour in the background
Facebook	300–500 MB	8–12%
Instagram	250–400 MB	5–8%
TikTok	400–600 MB	10–15%
AliExpress	200–350 MB	4–7%
Google Play Services	150–250 MB	3–5%

⚠️ Attention: Do not disable autorun for system applications like com.android.systemui or com.google.android.gmsThis may lead to:

• 🚨 Loss of notifications (SMS, calls, notifications from instant messengers will not arrive).
• 🔄 Spontaneous reboots.
• 📵 Problems connecting to a mobile network or Wi-Fi.

6. factory settings: when it is justified

If all the previous methods did not help, and the smartphone will freeze. for 5-10 seconds when opening the menu or applications crashit's time to consider hard reset (resetting to factory settings) This is a radical method, but it:

• ✅ Deletes all user data (photos, videos, messages).
• ✅ Resets system settings (including Wi-Fi passwords).
• ✅ Removes all installed applications.

🔄 When to reset:

• 🐢 The smartphone slows down even after clearing the cache and deleting applications.
• 📱 The device overheats without visible reasons.
• 🔋 The battery runs out in 2-3 hours (if the battery is working properly).
• 🚨 Errors appear like "The com.android.phone process has stopped".

📝 Step by step instructions:

1. Make a backup copy of important data (photos, contacts, messages). Use Google Photos, Titanium Backup (for root) or Swift Backup.
2. Go to Settings → System → Reset settings → Delete all data.
3. Confirm the action. The device will reboot and begin the reset process (takes 5-15 minutes).
4. After rebooting, perform the initial setup as when you turned it on for the first time.

💡

If the smartphone does not work turns on or freezes on the logo, you can reset via Recovery Mode. To do this, turn off the device, then press Power + Volume Up (on some models Power + Volume Down). In the recovery menu, select Wipe data/factory reset.

7. data-i="255">Cleaning up trash is like cleaning a room: if you don’t maintain order regularly, soon it will be a mess again. Here

Cleaning up trash is like cleaning your room: if you don't keep it in order regularly, it will soon become a mess again. Here 5 rulesthat will help keep your smartphone clean:

Weekly actions:

• 🗑️ Clear the cache of browsers (Chrome, Firefox) and social networks.
• 📂 Check the folder Download for unnecessary files.
• 🔄 Update applications (in new versions often optimize memory consumption).

Monthly actions:

• 📱 Remove unused applications (use Files by Google to find “forgotten” apps).
• 🔍 Check your storage c Settings → Memory for unexpectedly large files.
• 🔋 Calibrate the battery (once every 3 months): discharge the smartphone to 0%, then charge to 100% without interruption.

🚫 What NOT to do:

• 🧹 Use "cleaners" every day - they themselves create a load.
• 📴 Install antiviruses "just in case" - Android has built-in protection (Google Play Protect).
• 🔄 Disable system applications without understanding their function.

💡

Regularly clearing the cache and deleting unnecessary files prolongs the life of flash memory (especially on budget smartphones with memory eMMC instead UFS).

FAQ: Frequently asked questions about cleaning Android

❓ Is it possible to clean up garbage without root access?

Yes, most of the methods in this article (built-in tools, Files by Google, manual folder cleaning) do not require root. Root is only needed for deep cleaning of system partitions (/data, /cache).

❓ Why After clearing the cache, applications run slower?

This is normal: the cache speeds up the re-launch of applications. After clearing, apps will have to reload the data (for example, Instagram the tape will take longer to show).

❓ How to clear garbage on a memory card. (SD-card)?

Use the file manager to check the folders:

• .thumbnails — thumbnails;
• Android/obb — game files;
• DCIM/.thumbnails — gallery cache.

Also check the folder LOST.DIR —recovered files after crashes are stored here.

❓ Is it possible to delete the Android folder on the SD card?

No! The folder Android on the SD card contains data from installed applications. If you delete it, apps transferred to the memory card will stop working. You can only clear it. folders deleted applications inside it.

❓ Why does the garbage return after resetting to factory settings?

Resetting deletes user data, but does not change usage habits. If you install the same applications again, it does not clear the cache and does not. watch startup, garbage will accumulate again. Use preventive measures from section 7 section 7.