How to completely delete copied files on Android: from duplicates to temporary data

The accumulation of duplicates and unnecessary copies of files is one of the main reasons for lack of memory on smartphones Android. Even if you regularly delete photos or videos, the system continues to store backup copies, cached versions and temporary files from instant messengers. According to research, up to 30% of memory devices are occupied by duplicates, which users do not notice for years.

The problem is aggravated by the fact that Android does not always show all copies of files in the standard file manager. For example, WhatsApp and Telegram automatically save incoming media to hidden folders, and Google Photos can create thumbnails and backups without your knowledge. In this article we will look at 7 working methods find and delete all copied files - from manual cleaning to using professional tools.

We will pay special attention hidden folders with duplicates that are not visible through the standard explorer, and we'll explain how to safely clear them without the risk of damaging system data. If your smartphone has become slower or constantly displays a notification about low memory, these methods will help free up space from 5 to 20 GB places.

1. Finding duplicates through a standard file manager

Let's start with the simplest method that works on all devices Android without installing additional applications. The built-in file manager (for example, Files from Google or My files on Samsung) can search for duplicates, but this function is often overlooked.

Open the application Files and go to the section Cleaning or Memory analysis (the name may vary depending on the manufacturer). The system will automatically scan your device and show the categories of files that take up the most space. Pay special attention to:

• 📁 Folders Download and DCIM —duplicates of photographs and documents most often accumulate here.
• 🔍 Section "Duplicates" —if it is in your manager, the system itself will find duplicate files.
• 🗑️ Trash —many users forget that deleted files are stored here for another 30 days.

To manually find copies, sort the files by modified date or size. The duplicates are usually the same size and were created within seconds of each other. For example, if you see two files IMG_20231015_123456.jpg and IMG_20231015_123457.jpg with the same weight, this is a sure sign of a copy.

⚠️ Attention: Do not delete files from folders Android or data manually - this may lead to application failures. It is better to clear system duplicates (for example, cache Google Play Services) through application settings.

2. Using specialized applications to find duplicates

If manually searching for copies takes too long, use applications that automatically scan memory and find duplicate files. The best tools for this task:

Application	Features	Cons	Cost
Files by Google	Built-in duplicate analysis, cache clearing, simple interface	Does not find hidden system copies	Free
Duplicate Files Fixer	Deep scanning, search by file contents, cloud synchronization	Advertising in the free version	From 199 ₽/month
CCleaner	Removing duplicates + clearing cache and temporary files	There may be “tails” left after uninstallation	Free (Pro - 299 ₽)
SD Maid	Searching for duplicates + cleaning databases and basket	Complex interface for beginners	Free (Pro - 249 ₽)

We recommend starting with Files by Google - this is the official application from Google, which does not require root access and safe for the system. To find duplicates:

1. Open the application and go to the Cleaning tab.
2. Click Free up space → Duplicate files.
3. Select files to delete (can be sorted by type: photos, videos, documents).
4. Confirm deletion and empty the trash.

For deeper cleaning, use SD Maid (required root for some functions). This application even finds duplicates in system folders, but be careful - deleting the wrong files can disrupt the work. Android.

Back up important files|Check free space on the device|Close background applications|Disable auto-sync (Google Photos, Dropbox)

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3. Clearing cache and temporary application files

Many applications create temporary copies of fileswhich remain on the device even after the originals are deleted. For example:

• 📱 Messengers (WhatsApp, Telegram, Viber) save incoming media in folders WhatsApp Media or Telegram Images.
• 🎵 Music services (Spotify, Yandex Music) cache tracks for offline listening.
• 🎮 Games (for example, Genshin Impact or PUBG Mobile) store copies of textures and updates.

To clear this data:

1. Go to Settings → Applications.
2. Select an application (for example, WhatsApp).
3. Click Memory → Clear cache.
4. For complete clearing, click Clear data (will delete all settings and application files!).

Pay attention to the folder Android/data - application data is stored here. For example, the path to. cache Telegram looks like this: /storage/emulated/0/Android/data/org.telegram.messenger/cache. You can delete files from here, but some applications may start to work slower until the cache is restored.

4. Removing duplicate photos in Google Photos

Google Photos automatically creates thumbnails, backups and edited versions your photos that take up additional space. To find and delete them: Google Photos Thumbnails, Backups, and Edited Versions Open Google Photos and go to Google Photos data-i="157">Library → Utilities → Free up space

1. Open Google Photos and go to Library → Utilities → Free up space.
2. The application will show files that have already been uploaded to the cloud and can be deleted from the device.
3. To find duplicates, manually sort photos by date and look for pictures with the same shooting time.

Pay attention to the folder Pictures/.thumbnails —thumbnails of all images on the device are stored here. They can be safely deleted as they are restored automatically. Also check the folder DCIM/.thumbnailsif you are using the standard gallery.

If you edited photos in Google Photosthe application saves originals and edited versions as separate files. To delete unnecessary copies:

1. Open the photo in Google Photos.
2. Click ⋮ → Versions.
3. Delete unnecessary versions (original or edited copy).

⚠️ Attention: If you use the Backup and synchronization in Google Photosfunction, deleting files from the device will not delete them from the cloud. To free up space in cloud storage, delete files via the web version photos.google.com.

5. Search and delete hidden copies of system files

Android creates hidden copies of system files for recovery after failures. These files are usually not visible in standard Explorer, but can take up gigabytes of memory. To find them:

1. Install a file manager that supports displaying hidden files (for example, FX File Explorer or Solid Explorer).
2. Enable the display of hidden folders in the manager settings.
3. Go to the root directory (/storage/emulated/0/) and look for folders with a dot at the beginning of the name (for example, .backup, .cache, .temp).

Beware of deleting files from the following folders:

• 🚫 /system — system files Android.
• 🚫 /data — application and user data settings.
• 🚫 /efs —critical files IMEI and network settings.

You can safely clear:

• ✅ .thumbnails —image thumbnails.
• ✅ .Trash or .Recycle —recycle bins file manager.
• ✅ .temp —temporary files.

If you are not sure of the purpose of the file, it is better not to touch it. To deeply clean system copies, you will need root access, but this is risky for inexperienced users.

What happens if you delete system files?

Deleting critical files (for example, from /system) can lead to the device “bricking” - when the smartphone stops turning on or only boots into recovery mode. In the best case, you will need a reset to factory settings, in the worst case, a flashing via Fastboot or ODIN (for Samsung).

6. Automatic cleaning using Tasker or Automate

If you don't want to manually search for duplicates, you can configure automatic cleanup using automation applications such as Tasker or Automate. These tools allow you to create scripts that will:

• 🗓️ Delete files older than a certain age (for example, 30 days).
• 🔄 Clear application cache on a schedule.
• 📂 Move duplicates to a separate folder for manual checking.

Example of a simple script in Automate to remove duplicate photos:

1. Create a new thread (Flow).
2. Add a block File list and specify the path to the folder DCIM/Camera.
3. Add a block For each to iterate through files.
4. Use a block File hash to calculate the hash of each file.
5. Add a condition: if the hash matches the previous file, delete the duplicate.

For beginners, it is easier to use ready-made recipes from the community Tasker or AutomateFor example, there are scripts for:

• 📌 Automatic cleaning folders Download once a week.
• 📌 Deleting screenshots older than 7 days.
• 📌 Clearing the cache Google Chrome when connected to Wi-Fi.

⚠️ Attention: Before setting up automatic cleaning, test the script on unnecessary files. For example, create a test folder with copies of photos and check if the deletion works correctly.

7. Reset to factory settings as a last resort

If none of the methods work. helped, and there is still not enough space on the device due to hidden copies. This is a radical method that will delete resetting to factory settings. This is a radical way that will remove all data, including:

• 📱 Installed applications and their settings.
• 📂 Personal files (photos, videos, documents).
• 🔑 Accounts and passwords (except for data Google Account, if the device is linked to it).

Before resetting, be sure to:

1. Make a backup copy of important files on Google Drive, Yandex Drive or computer.
2. Export contacts and SMS (for example, via Google Contacts and SMS Backup & Restore).
3. Write down or take a photo of the settings of the applications you want to restore.

To reset:

1. Go to Settings → System → Reset settings.
2. Select Delete all data (reset to factory settings).
3. Confirm the action and wait for the reboot.

After the reset, the device will be like new, without unnecessary copies and garbage. However, this method should be used only as a last resort, since data recovery may take time. a lot of time.

FAQ: Frequently asked questions about deleting copied files

Is it possible to delete duplicates without root access?

Yes, most of the methods in this article (standard file manager, Files by Google, clearing the application cache) do not require rootHowever, for deep cleaning of system folders (for example, /data), you may need superuser rights.

Why after? deleting duplicates does not free up space?

This can happen for several reasons:

• The files ended up in the trash (clear it manually).
• Applications have restored the cache (restart the device).
• The system reserves space for updates (check in Settings → Memory).

Also, some files may be “locked” by applications - try closing all apps and repeating the deletion.

How to prevent duplicates from appearing in the future?

To avoid accumulation of copies:

• 📌 Set up auto-cleaning in messengers (WhatsApp → Settings → Storage).
• 📌 Disable automatic saving of media to Telegram (Settings → Data and memory).
• 📌 Clean the folder regularly Download (for example, once a month).
• 📌 Use cloud services (Google Photos, Dropbox) to store originals and delete local copies.

Is it safe to use cleaning applications (for example, Clean Master)?

Many "optimizers" (for example, Clean Master, DU Speed Booster) promise to free up memory, but often:

• 🚫 Remove useful files along with garbage.
• 🚫 Show false warnings about “critical errors”.
• 🚫 Collect user data for advertising.

It is better to use proven tools: Files by Google, SD Maid or a built-in file manager.

What should you do if, after deleting duplicates, your smartphone becomes slower?

This can happen if:

• You deleted the system application cache (for example, Google Play Services).
• Cleared application data folders (for example, Android/data).
• Deleted files from the folder .thumbnails, and the gallery is now rebuilding the thumbnails.

Solution: reboot the device and wait 10-15 minutes - the system will restore the necessary temporary files. If the lag remains, check the free space in Settings → Memory (must be at least 10% of the total volume).