Your Samsung Galaxy A51 began to slow down, applications take a long time to load, and the memory is full of who knows what? Most likely, the culprit is a full cache - temporary files that the system and apps accumulate to speed up work. But when there are too many of them, they begin to interfere: they take up space, slow down the phone and can even cause crashes.

In this article you will find step-by-step guide with videohow to clear the cache on Samsung A51 in all possible ways: from standard settings to hidden functions Recovery Mode. We will also look at which files can be deleted without riskwhich files should not be touched, and explain why the phone can work faster after cleaning.

It doesn’t matter whether you want to make room for new photos or just return your smartphone to its former state speed - these methods will help. And if something goes wrong, at the end of the article there is FAQ with solutions to typical problems.

Why you need to clear the cache on Samsung A51

Caches are temporary files that are created by applications and the system to speed up repeated access to data. For example, when you open Instagramit saves thumbnails of photos to show them faster next time. But over time, these files accumulate and begin to do more harm than good.

Here main signsthat the cache on your Galaxy A51 it's time to clear:

  • 📱 The phone has become slow down when switching between applications.
  • 🔄 Applications crashes or take a long time to load.
  • 📲 Memory is full, although you do nothing a new one was not installed.
  • 🔋 The battery is discharging faster than usual.
  • 🔥 Phone overheating for no apparent reason.

The Samsung A51 cache is divided into three types:

Cache type Where it is stored Can it be deleted Consequences of clearing
Application cache Folders of individual apps (for example, /data/data/com.facebook.katana/cache) Yes Applications will take longer to load when first launched
System cache Partition /cache (available via Recovery Mode) Yes, but be careful Some system settings may be reset
Dalvik cache Partition /data/dalvik-cache Only via Recovery or after updating Applications will be recompiled the next time you start

On Samsung A51 with One UI 4.0+ firmware, the application cache can take up to 3–5 GBif you never clear it. In this case, the system automatically deletes the oldest files only when there is not enough space, which is not always effective.

📊 How often do you clear the cache on your smartphone?
Once a week
Once a month
Only when the phone starts to slow down
Never cleaned

Method 1: Clearing the cache of individual applications through settings

The safest method is to delete the cache for specific apps. This will not affect their data (for example, saved games or chats), but will free up space and may eliminate errors.

Instructions for Samsung Galaxy A51:

  1. Open Settings (gear on the main screen or in the notification panel).
  2. Go to Applications (or Manage applications).
  3. Click on the three dots in the upper right corner and select Sort by size so you can see which apps are taking up the most space.
  4. Select an application (for example, Facebook or YouTube).
  5. Tap on Memory (or Storage).
  6. Click Clear cache.

For convenience, you can use quick access:

  • 🔍 Long-press the application icon on the main screen → select Application information → Memory → Clear cache.
  • 📊 In Settings → Device care → Memory you will see a list of applications sorted by occupied space.

Close the application in multitasking

Check whether it is used for important tasks (for example, a navigator during a trip)

Make sure that you have a stable Internet (the application will take longer to load when first launched)-->

⚠️ Attention: Do not confuse Clear cache and Clear data! The second action will delete all settings, accounts and saves in the application (for example, correspondence in WhatsApp or progress in games).

Method 2: Bulk clearing the cache of all applications

If you are too lazy to clear the cache for each application individually, you can do it for all at once. Samsung A51 there are two methods:

Method. 1: Through "Device Care"

This is a built-in tool from Samsungthat analyzes the system and offers optimization:

  1. Open Settings → Device Care.
  2. Click Memory (or Clear in older versions of One UI).
  3. Wait for analysis to complete (may take 10–30 seconds).
  4. Tap Clear next to the item Unnecessary data or Cache applications.

This method deletes only safe temporary fileswithout affecting application data.

Method 2: Through the "Storage" menu

Deeper cleaning, but requires confirmation:

  1. Go to Settings → Storage (or Device and care → Memory).
  2. Click on Other applications or Cached data.
  3. Confirm cleaning in the window that appears.

After mass clearing, some applications (for example, Google Maps or Instagram) will take longer to load when first launched - this is normal.

💡

If the application is unstable after clearing the cache, try rebooting the phone. In 90% of cases, this solves the problem.

Method 3: Clearing the system. cache via Recovery Mode

If the phone is very slow or you recently updated the firmware, clearing system cache (section /cache) This method is more radical, but safe - it does not delete your data.

Instructions for Samsung Galaxy A51:

  1. Turn off the phone.
  2. Press the buttons simultaneously Volume up + Power and hold them for 5-7 seconds until the logo appears Samsung.
  3. When the phone vibrates, release the button Powerbut continue to hold Volume upuntil you see the menu Recovery Mode (a blue screen with the text No command may appear first - this is normal).
  4. Use the volume buttons to navigate and the button Power to select.
  5. Select Wipe cache partition.
  6. Confirm the action by selecting Yes.
  7. After completion, select Reboot system now.

The whole process takes 2-3 minutes. The phone will reboot automatically.

⚠️ Attention: Do not select Recovery Mode items Wipe data/factory reset or Wipe dalvik cache —this will lead to resetting settings or deleting application data!
What to do if Recovery Mode does not open?

If, after pressing the buttons, the phone simply turns on in normal mode, try:

1. Connect the charger (sometimes Recovery does not start when the battery is low).

2. Use the combination Volume up + Bixby + Power (on some firmware).

3. Try again, holding the buttons longer (up to 10-15 seconds).

If all else fails, you may have a custom Recovery installed on your phone (for example, TWRP).

Method 4: Using third-party applications to clear the cache

If you need deeper cleaning or automation of the process, you can use specialized utilities. On Samsung A51 work well:

  • 🧹 CCleaner - deletes the cache, residual files and analyzes startup.
  • 🔍 SD Maid - finds and cleans "junk" files, including the Dalvik cache.
  • 📊 Files by Google - a simple tool with a cleaning function cache.
  • 🛡️ AVG Cleaner - additionally checks the phone for viruses.

How to use (using an example CCleaner):

  1. Download the application from Google Play.
  2. Open it and provide the necessary permissions.
  3. Go to the section Cleaning or Junk.
  4. Select Application cache and other unnecessary files.
  5. Click Clean.

Third-party applications can find and remove up to 20–30% of “invisible” garbagewhich is not displayed in the standard settings. However, be careful:

  • ❌ Don't give apps access to Rootif you do not understand what you are doing.
  • ❌ Do not clear the cache of system applications (for example, Android System or Samsung Experience) - this may lead to crashes.
💡

Third-party cleaners are convenient, but do not replace manual checking. Always check which files they suggest deleting so as not to lose important data.

Method 5: Automatic cache clearing (One UI setup)

Samsung One UI (firmware on Galaxy A51) has built-in tools for automatic optimization. They can be configured so that the cache is cleared without your participation.

How to enable:

  1. Open Settings → Device care.
  2. Tap on the three dots in the upper right corner and select Settings.
  3. Enable the option Automatic optimization.
  4. Select frequency: Daily or When the screen is locked.

You can also configure auto-clear the cache for individual applications:

  1. Go to Settings → Applications.
  2. Select the desired application (for example, Chrome).
  3. Tap Memory → Memory management.
  4. Enable Automatic cache clearing.

These settings will help keep your phone clean without manual intervention. However, automatic clearing does not always delete all unnecessary files, so periodic manual checking is still useful.

⚠️ Attention: On some firmware Samsung A51 automatic optimization may conflict with running games or the navigator. If you notice lags, disable it or add the necessary applications to exceptions.

What to do if problems remain after clearing the cache

Clearing the cache does not always solve all performance problems. If the phone is still slow, try the following steps:

  • 🔄 Restart the phone — sometimes this helps to “reset” temporary glitches.
  • 🗑️ Uninstall unnecessary applications —even unused apps can run in the background.
  • 🔋 Check the battery —if it is worn out, the phone may artificially reduce performance.
  • 🛠️ Update the firmware —in new versions of One UI often fix errors that cause lags.
  • 🧹 Reset to factory settings (as a last resort, if nothing helps).

If the problem appears immediately after clearing the cachemaybe something important was deleted. In this case:

  1. Restart the phone.
  2. Open the “problem” application and wait until it restores the cache.
  3. If the error persists, reinstall application.

On Samsung A51 there is also a specific problem: after clearing the cache, Galaxy Store or Samsung Pay may not work. In this case:

  1. Open Settings → Applications.
  2. Find Galaxy Store or Samsung Pay.
  3. Tap Memory → Clear data (not cache!).
  4. Reboot your phone and log in to your account Samsung again.

FAQ: Frequently asked questions about clearing the cache on Samsung A51

❓ How often do you need to clear the cache on Samsung A51?

Optimal frequency depends on usage:

  • 📱 Active users (many applications, games, social networks) - once every 1-2 weeks.
  • 👤 Average user - once a month.
  • 🐢 If the phone does not slow down has enough memory - once every 2-3 months or less.

One UI automatically clears the cache when there is not enough space, but this is not always enough.

❓ Is it possible to clear cache for all applications at once without third-party apps?

Yes, through Settings → Storage → Cached data. But this method deletes the cache of all applications, including system ones, which can cause temporary lags.

A safer way is to use Device care (see Method 2).

❓ Why after clearing the cache, some applications work slower?

This is normal! The cache speeds up the re-launch of applications. After clearing:

  • 📥 The application has to re-download). data-i="321">🔄 System data (for example, thumbnails in Instagram).
  • 🔄 System recompiles some files (especially after clearing the Dalvik cache).

The speed will return to normal after 1-2 starts.

❓ Is it possible to clear the cache for Samsung system applications?

It is possible, but not for everyoneIt is safe to clear the cache:

  • ✅ Galaxy Store
  • ✅ Samsung Internet
  • ✅ Samsung Keyboard

It is not recommended to touch:

  • ❌ Android System
  • ❌ Samsung Experience Framework
  • ❌ SecSettings (security settings)

Clearing the cache of system applications can lead to malfunctions One UI.

❓ How to clear the cache for Google Play Services and other Google services?

These applications are critical to the operation of Android, but their cache can be cleared if they take up too much space:

  1. Open Settings → Applications.
  2. Click on the three dots → Show system processes.
  3. Find Google Play Services, Google Services Framework or Google Play Market.
  4. Tap Memory → Clear cache.

⚠️ Do not clear data these applications - this can disrupt the operation Google Play!