What clogs Android phone memory and how to properly clean Samsung: a detailed guide

Are you again seeing the message “Memory full” on your Samsung Galaxy, although you have deleted photos and haven’t installed games for a long time? The problem is not your forgetfulness - modern Android smartphones (especially those with shell One UI) have dozens of hidden mechanisms that devour gigabytes unnoticed. Application cache, duplicate media files, update remnants and even system logs can take up to 30-40% of the total memory, without being displayed in the standard file manager.

In this article we will not just list banal tips like “delete unnecessary photos”. We will analyze 7 real reasonswhy memory on Samsung (including models Galaxy S23 Ultra, A54 5G, M34 etc.) gets clogged even with careful use, and we will show 5 proven cleaning methods - from manual to automated, taking into account the features of the firmware One UI 5.1/6.0. You will also find out which files can be deleted without risk, and which files should absolutely not be touched (even if they take up 10+ GB).

1. Top 7 memory “eaters” on Samsung: what takes up space unexpectedly

Most users believe that only photos, videos and applications clog up memory. In fact more than 50% of "junk" files hidden from view and accumulate over the years. Here are the main culprits:

• 📁 Application cache and system cache: temporary files that should be deleted automatically, but often remain due to failures. For example, Google Play Services can accumulate up to 2-3 GB of cache in six months.
• 🔄 Remaining OS updates: after installing a new version One UI old firmware files are not always deleted. On Galaxy S22 this can “eat up” up to 5-7 GB.
• 📸 Duplicates and thumbnails of media files: the gallery creates copies for preview, and messengers (for example, WhatsApp) save sent photos in a separate folder.
• 🎮 Game data (OBB files): even after deleting a game, its cache and downloaded levels may remain in the folder /Android/obb/.
• 📄 System logs and dumps: files with error reports (/data/log/) that are created during crashes applications. They accumulate for years.
• 🔒 Secure Folder: if you have ever used this function Samsung, files from it can remain in memory even after deletion.
• ☁️ Offline cache of maps and streaming content: Google Maps, YouTube Premium, Spotify download data to work without the Internet, but rarely clear it.

Particularly insidious system filesthat are not visible in the standard Explorer. For example, a folder /data/app/ can weigh 10+ GB due to the remnants of deleted applications, and a folder /data/dalvik-cache/ can weigh another 1-2 GB. They cannot be deleted without root access, but can be reduced in other ways (more on that below).

2. How to check what exactly is taking up memory on Samsung

Before cleaning, you need to understand Which files they are eating up space. Standard tools One UI show only the tip of the iceberg. Here's how to get the full picture:

Method 1: Built-in memory analysis

Go to Settings → Device care → Memory. Here you will see:

• 📊 Total amount of used/free memory.
• 📦 Breakdown by category: “Applications”, “Images”, “Video”, etc.
• 🔍 "Clean" button to remove unnecessary files (but it works superficially!).

Pay attention to the "Other files" section - if it takes up >5 GB, it means that a lot of garbage has accumulated in the system.

Method 2: Advanced analysis via My Files

Open application My files (or My Files) and go to the “Memory Analysis” section. There are two important tabs here:

• Large files: shows files >100 MB (often forgotten videos or backups are found here).
• Unused applications: apps that you have not used for >3 months.

Method 3: Third-party analyzers (for deep scanning)

If the built-in tools do not give a complete picture, install one of these applications (they will show hidden files and folders):

• 🛠️ Files by Google (free, without unnecessary water).
• 📊 DiskUsage (visualizes the occupied space in the form of a chart).
• 🔍 SD Maid (paid, but finds garbage that is not available to other utilities).

3. Guide to clearing memory on Samsung: from simple to complex

Now let's move on to practice. We have collected 5 methods from the safest to the most advanced ones that require caution. Start with the first one and move on to the next one if space is not freed up.

Method 1: Clearing cache and unnecessary files through One UI

This is the safest method that does not affect personal data:

1. Open Settings → Device care → Memory.
2. Click “Clean” (blue button at the bottom).
3. Select “Junk cleaning” and confirm the action.

This method removes:

• 🗑️ Temporary application files.
• 📥 Remains of downloads from the browser.
• 📦 Cache Google Play Store i Google Play Services.

Usually freed 1-3 GB, but if a lot of garbage has accumulated, there may be more.

Method 2: Removing duplicates and unnecessary media files

Photos and videos often take up the lion's share of memory. Here's how to optimize them:

1. Open Gallery → click on the three dots → “Manage Folders.”
2. Select “Duplicates” or “Similar Images” (feature available on One UI 5.0+).
3. Delete unnecessary copies (you can select all at once).

Also check the folders:

• DCIM/.thumbnails — photo thumbnails (can be deleted).
• Pictures/Screenshots — old screenshots.
• WhatsApp/Media — media files from chats (especially video!).

Method 3: Clearing application data (without deleting the apps themselves)

Many applications accumulate gigabytes of data that can be reset without loss functionality. For example:

• 🎵 Spotify/YouTube Music: cached songs (up to 10 GB!).
• 🗺️ Google Maps: offline maps.
• 📺 Netflix/Kinopoisk: downloaded movies.

How clear:

1. Go to Settings → Applications.
2. Select the desired application → “Memory” → “Clear data” (or “Clear cache”).

⚠️ Attention: Cleaning data (not the cache!) will reset the application settings and log out of your account. For messengers (Telegram, Viber) this means the loss of chats if they are not synchronized with the cloud.

Method 4: Removing update residues and system debris

After the update One UI old firmware files may remain in memory. To delete them:

1. Open My Files → "Internal memory".
2. Go to the folder /data/ota_package/ (may be hidden - turn on display of hidden files in settings My Files).
3. Delete files with extension .zip or names like update_*.zip.

Also check the folders:

• /cache/ — system cache (can be cleared completely).
• /data/log/ — error logs (delete files older than 1 month).

Method 5: Resetting the partition cache (for advanced users)

If the previous methods did not help, try resetting the cache partition via recovery mode. This will not delete personal data, but will clear system garbage:

1. Turn off the phone.
2. Hold Volume up + button Power (on Galaxy S23 — Volume up + Bixby + Power).
3. In the menu Recovery select Wipe cache partition (use the volume buttons to navigate, the power button to select).
4. Confirm the action and reboot phone.

This method frees 1-5 GBif the partition cache was heavily fragmented.

4. Hidden functions One UIthat help save space

Samsung built into One UI several useful tools that many people do not know about. They automatically optimize memory without your participation.

Function 1: Auto-cleaning. garbage

Enable it like this:

1. Settings → Device care → Automation.
2. Activate the "Auto cleaning" switch.
3. Select frequency: daily or weekly.

The system will automatically delete unnecessary files when the phone is charging and connected to Wi-Fi.

Function 2: Optimizing photos

If you have little space, but a lot of photos, turn on compression:

1. Open Gallery → three dots → “Settings”.
2. Select “Memory optimization”.
3. Activate “Save photos in high quality” (they will be compressed to 80% of the original without visible loss quality).

Function 3: Transferring applications to a memory card

If the phone has a slot for microSD, transfer heavy applications there:

1. Settings → Applications.
2. Select an application → “Memory” → “Change” (if the option is active).
3. Click “Memory card”.

⚠️ Attention: Not all applications support transfer to SD. Also, the card must be formatted as Internal memory (this will delete all data from it!).

Function One UI	What it does	How much it frees
Auto-cleaning garbage	Deletes temporary files and cache	0.5–2 GB/month
Photo optimization	Compresses images without loss of quality	Up to 50% of the volume photo
Moves applications to SD	Moves APK and application data	Depends on the size of applications
Clear duplicates	Finds and deletes duplicate files	0.5–5 GB (depending on the number of photos)

5. What NOT to do when clearing memory (5 dangerous mistakes)

Many tips from the Internet may not only not help, but also damage this is something that is categorically not recommended. do:

• 🚫 Delete the folder Android manually: it contains application data. Removing it will crash the apps.
• 🚫 Clear the cache of all applications at once: this will slow down the phone, as the system will rebuild the cache again.
• 🚫 Format the internal memory as external: this will delete all data and may damage the partition with the firmware.
• 🚫 Use “cleaners” like Clean Master: they often delete necessary files and show false warnings.
• 🚫 Delete files from /system/ without root access: this will lead to a crash of the OS and the need for flashing.

Also not worth:

• 🔋 Clear memory down to the last megabyte: Android needs 10-15% of free space for stable operation.
• ☁️ Completely refuse backups: if the phone breaks, you will lose all your data.

What will happen if you delete the DCIM folder?

The folder DCIM contains all the photos and videos taken by the camera. Deleting it will lead to the loss of all media files if they are not synchronized with the cloud. It will be extremely difficult to restore them (you will need special apps like DiskDigger, and even they do not guarantee 100% results).

6. Alternative ways to free up space (if all else fails)

If you have tried all the methods, but there is still not enough memory, consider these options:

Method 1: Transferring data to a PC or cloud

Copy photos, videos and documents to:

• 💻 Computer (via cable USB-C or Samsung Smart Switch).
• ☁️ Cloud:
  • Google Photos (unlimited storage for compressed photos).
  • Samsung Cloud (15 GB free for owners Galaxy).
  • Yandex Disk or Mail.ru Cloud (10-100 GB free).

Method 2: Using an OTG drive

If the phone does not have a slot for microSD, connect USB flash drive via an adapter OTG. Modern Samsung (starting from One UI 3.0) support working with external drives as with internal memory.

Method 3: Removing pre-installed applications (bloatware)

Samsung and Google install many unnecessary applications that cannot be removed using standard methods. But you can disable:

1. Go to Settings → Applications.
2. Click on the three dots → “Show system applications.”
3. Select an unnecessary application (for example, Samsung Free, Bixby, AR Emoji) → “Disable.”

This will not free up much space, but will reduce background activity.

Method 4: Reset to factory settings (extreme case)

If the phone is full and slow, do hard reset:

1. Make a backup copy of all data!
2. Go to Settings → General settings → Reset → Data reset.
3. Enter the PIN code and confirm the action.

After the reset, the phone will be like new, but all data will be deleted.

💡

Resetting to factory settings is the last chance if the phone has become unusable. Before doing this, be sure to check that it is synchronized. whether your contacts, photos and notes with your account Google or Samsung.

7. How to prevent memory from filling up in the future

In order not to return to cleaning every couple of months, follow these rules:

• 📱 Check your memory regularly: open once a month Settings → Device care → Memory.
• ☁️ Set up automatic synchronization photos and videos from Google Photos or Samsung Cloud.
• 🎮 Limit the game cache: in settings Google Play Market set the cache limit for applications.
• 📥 Delete downloads: folder Download often contains unnecessary files (APK, PDF, archives).
• 🔄 Update applications: new versions are often optimized and take up less space.

Also useful:

• 📵 Use “Easy work mode” (Settings → Device care → Light work mode), if memory is critically low.
• 📊 Install memory widget to the main screen to see free space in real time.

⚠️ Attention: If the memory becomes full do it yourself (without your actions), this may be a sign of a virus or file system failure. In this case, check your phone with an antivirus (Malwarebytes or Dr.Web) or run. reset.

FAQ: Frequently asked questions about clearing memory on Samsung

Is it possible to delete the Android folder without consequences?

No, folder Android contains application data (settings, cache, OBB files of games). Deleting it will crash the apps. Instead, clear the cache of individual applications through Settings → Applications.

Why does the memory quickly fill up again after cleaning?

Probable reasons:

• 📱 Background synchronization (for example, Google Photo: new versions weigh 3-5 GB. OS updates: if the phone is rebooted frequently, they accumulate in System logs data-i="344">Check your synchronization settings and disable automatic media downloads in messengers. or WhatsApp download media files automatically).
• 🔄 OS updates: new versions One UI weigh 3-5 GB.
• 📁 System logs: If the phone is rebooted frequently, they accumulate in /data/log/.

Check your synchronization settings and disable automatic media downloads in instant messengers.

How to clear memory on Samsung without losing photos?

First transfer the photo to the cloud (Google Photos, Samsung Cloud) or to your PC. Then: Google Photos cache

1. Remove duplicates via Gallery (Albums → Folder Management → Duplicates).
2. Clear cache Galleries and Google Photos in application settings.
3. Delete thumbnails from the folder DCIM/.thumbnails.

This will free 1-3 GB without losing original photos.

What to do if the phone says “Memory is full”, but supposedly there is enough space?

This is a typical file system error. Try:

1. Reboot your phone.
2. Clear the partition cache via Recovery (see Method 5 above).
3. Check your phone for viruses (for example, Malwarebytes).
4. If all else fails, reset to factory settings.

Sometimes the problem is solved by updating One UI to the latest version.

Is it possible to increase memory on Samsung using a card memory?

Yes, but with reservations:

• 📱 On phones with One UI 2.0+ the card microSD can be formatted as internal memory (this will combine it with the main storage).
• ⚠️ After formatting, the card cannot be used in other devices without data loss.
• 🎮 Not all applications support transfer to SD (especially games and system utilities).

Better use the card to store media files, not applications.