Which Android folders are garbage stored in: a complete list of places for cleaning

Does your smartphone on Android over time begin to “slow down”, although there seems to be enough free space? The reason for this is - hidden digital garbage, which accumulates in dozens of system and user folders. Application cache, temporary update files, remnants of deleted apps, duplicate media files - all this takes up precious gigabytes of memory and slows down the device.

Unlike iOS, where the file system is tightly controlled by the system, Android gives the user more freedom - and with it more opportunities to “clog” the device. But where exactly to look for this garbage? In this article we will analyze all key folderswhere unnecessary files accumulate, we will explain what can be deleted without risk, and what is better left untouched. You will also learn how to automate cleaning and avoid the re-accumulation of garbage.

We warn you right away: some folders require root access for access. If you are not ready to risk losing data or disrupting the system, use proven cleaning applications (we will also talk about them below).

1. Folder /data/data/: the main storage area for cache and temporary files

This is the epicenter of garbage storage on Android. Here, each installed app creates its own subfolder with a unique name (for example, com.android.chrome for the browser Google Chrome). Hidden inside them are:

• 🗑️ Application cache (/data/data/[package_name]/cache/) - temporary files to speed up apps. It is safely cleared, but will be restored the next time you start it.
• 📁 Databases (/data/data/[package_name]/databases/) - settings, logs and other data are stored here. Uninstalling may reset the application settings.
• 🔄 Remains of deleted applications —sometimes folders remain even after uninstalling the app. They can be deleted manually.

⚠️ Attention: Deleting files from /data/data/ without root access is impossible through a standard file manager. To access you will need either ADBor specialized utilities like Root Explorer.

If you do not want to dig into system folders, use the built-in cache clearing function: Settings → Storage → Cache data. This will delete the cache of all applications at once, without affecting critical data.

2. Folder /sdcard/Android/data/: garbage from games and heavy applications

This folder (also known as /storage/emulated/0/Android/data/) contains data from applications that have the right to write files to external storage. The following most often accumulate here:

• 🎮 Game cache — textures, levels, saves. For example, PUBG Mobile or Genshin Impact can occupy several gigabytes here.
• 📥 Update downloads - APK files, patches, additional resources.
• 🗂️ Offline maps (Google Maps, Yandex.Maps) - take up hundreds of megabytes.

Unlike /data/data/, this folder can be cleared without root access. It is enough to connect your smartphone to the PC or use a file manager (for example, Solid Explorer).

⚠️ Attention: Deleting the application folder from /Android/data/ may lead to malfunctions in its operation. It is better to first delete the application itself via Settings → Applications, and then manually check whether unnecessary files remain.

File type	Example application	Can I delete?	Recommendation
Game cache	Call of Duty: Mobile, Free Fire	Yes	Delete through game settings or file manager
Offline maps	Google Maps, 2GIS	Yes	Clear in the application settings
Downloaded media	Telegram, WhatsApp	Partially	Delete manually, but keep important files
Temporary update files	Any applications	Yes	Delete files with the extension .tmp or .apk.part

3. Folder: forgotten downloads and thumbnails These two folders are classic “dust collectors” on any device. /sdcard/Download/ And /sdcard/DCIM/.thumbnails/: forgotten downloads and thumbnails

These two folders are classic “dust collectors” on any Android-device. IN Download accumulate:

• 📄 APK files old versions of applications.
• 📊 PDF documentsthat have not been needed for a long time (tickets, receipts).
• 🎵 Audio files from instant messengers or social networks.

Folder .thumbnails stores thumbnails for quickly viewing images and videos. Over time, thousands of small files can accumulate here, taking up to 500 MB or more (especially if you often take photos or download memes).

Emptying these folders is safe, but requires care: Files by Google → Cleanup → Large files or Gallery → Albums → Downloads folder.

⚠️ Attention: Some applications (for example, Telegram) save media files to Download default. Before mass deletion, check if there are any important documents or photos there.

4. Folder /sdcard/Android/obb/: heavy files of games and applications

Files with the extension .obb are additional data for applications, usually games. They can weigh from 100 MB to 2+ GB each. For example:

• 🎮 Asphalt 9 — ~1.5 GB.
• 🎮 PES 2023 — ~1.8 GB.
• 📺 Offline content streaming services (Netflix, YouTube Premium).

Delete .obb-files are possible, but only if you no longer use the application. Otherwise, the game or app may stop working or require you to download the data again.

To find these files: File manager → Device memory → Android → obb.

5. System folders /cache/ and /system/cust/: hidden Android junk

These folders belong to system partition and are usually inaccessible without root access. The following are stored here:

• 🔄 OTA update files (/cache/) - remain after installing updates Android.
• 📋 System logs (/system/cust/) - error logs, debugging information.
• 🛠️ Temporary recovery files (if used TWRP or CWM).

Cleaning these folders can provide additional 100–500 MB free space, but requires caution. For example, deleting files from /cache/ may cause the next system update to fail.

For safe cleaning:

1. Use ADB-command:

   adb shell su -c "rm -rf /cache/*"

2. Or install the application SD Maid (requires root).

⚠️ Attention: Do not delete files from /system/ manually - this can lead to device inoperability ("brick"). Even with root access it is better to use proven utilities.

What will happen if you delete everything from /cache/?

The system will recreate the necessary files the next time it starts, but there may be delays at the first boot after cleaning. In rare cases, you may need to reboot to recovery to restore.

6. Messenger folders: /sdcard/WhatsApp/, /sdcard/Telegram/

Messengers are the main “eaters” of memory. For example, Telegram by default saves all media files to the folder /Telegram/Telegram Images/, and WhatsApp to /WhatsApp/Media/. The following are accumulated here:

• 📸 Photos and videos from chats (including duplicates).
• 🎵 Audio messages and voice notes.
• 📄 Documents (PDF, DOCX, XLSX).
• 🎫 Stickers and GIF animations.

Cleaning out these folders is safe, but requires manual sorting. For example, in Telegram you can configure automatic media deletion via Settings → Data and memory → Storage.

For WhatsApp: Settings → Memory → Memory management — here you can sort files by size and date.

7. Folder /sdcard/Bluestacks/ Android emulators

If you use emulators Android on a PC (for example, BlueStacks, LDPlayer, MuMu), then their traces may also remain on the smartphone itself. These apps often create folders for:

• 🖥️ Backups emulated applications.
• 🎮 Game cacherun through the emulator.
• 📁 Configuration files (.ini, .cfg).

These folders are usually small, but if you have not used the emulator for a long time, you can delete them. Look for them by name: /sdcard/Bluestacks/, /sdcard/ldplayer/, /sdcard/Microvirt/ (for MuMu).

How to automate garbage cleaning on Android

Manually cleaning folders is effective, but time-consuming. Fortunately, there are ways to automate the process:

1. Built-in tools:
   • 📱 Google Files — analyzes memory and suggests deleting unnecessary files.
   • 🔍 Settings → Storage → Free up space —shows large and rarely used files.
2. Third-party applications:
   • 🧹 CCleaner —cleanses cache, history, temporary files.
   • 🛠️ SD Maid (requires root) - deep cleaning of system folders.
   • 🗑️ Clean Master - simple interface, but a lot of advertising.

Application settings:

• 🔄 In Google Play Store disable automatic application updating or limit it to Wi-Fi only.
• 📥 In messengers (Telegram, Viber) set up automatic removal of media after viewing.

For advanced users, a script for Tasker or Automateis suitable, which will clean selected folders weekly (for example, /Download/ or /DCIM/.thumbnails/).

⚠️ Attention: Automatic “cleaners” sometimes delete the necessary files, especially if they analyze folders by keywords (for example, all files with the extension .apkAlways check what exactly is proposed to be deleted before confirming.

FAQ: Frequently asked questions about junk on Android

Can it be deleted? folder /Android/obb/ entirely?

Yes, but only if you do not play games that use it. Files .obb is additional data for applications (usually games), and deleting them will cause the game to require you to download these files again the next time you launch them. If the game has already been deleted, feel free to clear its folder in obb.

Why is memory freed for a short time after clearing the cache?

Caches are temporary files that applications create to speed up work. Once cleared, they are restored the next time the apps are launched. To reduce the cache size, try:

• Limit background application activity in Settings → Applications → [application name] → Battery.
• Disable automatic application updates in Google Play.
• Use lite versions applications (for example, Facebook Lite instead of the main one Facebook).

How to find and remove duplicate photos?

Duplicates often appear when sending photos via instant messengers or saving the same images in different folders. To search for them, use:

• 📸 Google Photos —there is a function in the settings search for duplicates.
• 🔍 Duplicate Files Fixer is a specialized application for searching for duplicate files.
• 🖥️ On PC: CCleaner or Duplicate Cleaner (scan the folder /DCIM/ and /Pictures/).

Before mass deletion, check whether the “duplicates” are versions of the same photo in different resolutions (for example, the original and a compressed copy for the messenger).

What to do if, after clearing the garbage, the smartphone began to work slower?

This is a rare but possible situation. The reasons may be the following:

• 🔄 You deleted system files from folders /system/ or /cache/, which led to failures.
• 🗑️ Clearing the cache forced applications to rebuild it from scratch, which temporarily loads the processor.
• 🛠️ Enabled on the device Aggressive battery optimizationwhich limits background processes.

Solutions:

1. Restart the device.
2. Check Settings → Accessibility → Optimization and turn off unnecessary restrictions.
3. If the problem persists, try resetting to factory settings (make a backup first).

How to clear junk on Android without root access?

Without root you will not be able to access system folders (/data/data/, /cache/), but you can clear:

• 🗃️ Application cache via Settings → Storage → Data cache.
• 📁 Folders /Download/, /DCIM/.thumbnails/, /Android/data/ (for remote applications).
• 🎮 Game cache manually or through the game settings.
• 📱 Temporary messenger files (WhatsApp, Telegram).

Also use applications like Files by Google or CCleanerthat can find unnecessary files without root.