Clearing the cache on Samsung Galaxy A40: a complete guide with pictures

Has your Samsung Galaxy A40 began to slow down, applications take a long time to load, and memory runs out out of the blue? The reason may lie in a clogged cache - temporary files that accumulate over time. The cache speeds up apps, but if it is not cleared, it turns into digital garbage, taking up precious gigabytes.

In this article you will find 5 proven ways to clear the cache on Galaxy A40 —from standard Android tools to hidden functions One UI. We will look at how to clear the cache of individual applications, the system cache, and also what to do if the phone still lags after cleaning. All instructions are adapted for firmware One UI 5.1/6.0 (Android 13/14) and do not require root access.

Before you start, remember: clearing the cache Does not delete personal data (photos, messages, contacts), but maybe reset settings in some applications (for example, you will have to re-enter your login on social networks). If after cleaning the application behaves strangely, just restart the phone.

1. Clearing the cache of individual applications through settings

The safest way is to delete the cache for specific apps that take up the most space or are unstable. On Galaxy A40 this is done through the app menu:

1. Open Settings → Applications.
2. Click on the three dots in the upper right corner and select Sort by size.
3. Tap on the application (for example, Facebook or Google Chrome).
4. Go to Memory → Clear cache.

For convenience, we have compiled a table of applications that most often clog the cache on Galaxy A40:

Tip: If in the list of applications you see Android System WebView with a large cache, do not delete its data! This is a system component responsible for displaying web pages in! applications. Instead, update it via Google Play.

Close all background apps

Connect to Wi-Fi (if you plan to update applications after cleaning)

Check whether important data (passwords, bookmarks) is synchronized with your Google account

Make a backup copy of messages in instant messengers (if you use non-standard clients)-->

2. Automatic cache clearing via Device Care

Samsung Galaxy A40 equipped with a built-in optimization tool - Device Care (in Russian firmware it can be called “Device Maintenance”). delete unnecessary files, including the cache:

1. Go to Settings → Device Care.
2. Click Memory (or "Storage").
3. Wait for the scan to complete (usually takes 10-30 seconds).
4. Tap Clear now.

This method deletes only safe temporary fileswithout affecting the user data However, it does not. clears the cache of system applications - this will require manual cleaning (see section 4).

One UI also suggests function Automatic cleaning:

• 🔄 Enabled in: Settings → Device maintenance → Three dots → Settings → Automatic cleaning.
• ⏰ Works: When free memory remains less than 10%, or once per week (configurable).
• ⚠️ Limitation: Does not clear the cache of messengers and social networks - only system temporary files.

3. Clearing the browser cache (Chrome, Samsung Internet)

Browsers are the main cache eaters. Galaxy A40 and Google Chrome And Samsung Internetare installed by default:

Google Chrome

1. Open Chrome, tap on three dots. → History.
2. Select Clear data.
3. Select the checkboxes next to Cookies and data sites and Cached images and files.
4. Click Clear data.

Samsung Internet

1. Start the browser, tap on three lines → Settings.
2. Go to Privacy and Security → Delete browsing data.
3. Select Cached images and files (you can also delete history and cookies).
4. Click Delete.

Attention: If you use the "Save Page" function in Samsung Internet, clearing the cache will delete all offline versions of sites. To save them, first export your bookmarks through Settings → Data & Sync. → Export bookmarks.

4. Clearing the system cache via Recovery Mode

If the phone is very slow and standard methods do not help, try delete system cache (dalvik-cache). This will not delete your data, but will reset application optimization, so after the procedure the phone may take longer to boot (up to 5-10 minutes).

Instructions for Samsung Galaxy A40:

1. Turn off phone.
2. Press simultaneously Volume up button + Power button and hold for 5-7 seconds until the logo appears Samsung.
3. Release the buttons After a few seconds, it will open. menu Recovery Mode.
4. Use the volume buttons to navigate and select Wipe cache partition.
5. Confirm the selection with the Power button.
6. Once completed, select Reboot system now.

⚠️ Attention: Do not confuse Wipe cache partition with Wipe data/factory resetSecond! This option will completely reset the phone to factory settings, deleting all your data.

This method is especially useful after a firmware update, when old temporary files may conflict with the new version. One UIIf after clearing the system cache the phone is still unstable, check for updates in Settings → Software Update.

5. Using third-party applications to clear the cache

If the built-in tools Samsung do not suit you, you can use third-party utilities We tested several popular applications on Galaxy A40 and chose. the most effective:

• 🧹 CCleaner — clears the cache, temporary files and residual data of deleted applications. There is a function for monitoring the processor temperature.
• 🚀 SD Maid — finds “junk” files, including the cache of system applications that are not visible in the standard settings.
• 📊 Files by Google —a simple tool from Google with the “Clean” function (removes the cache, duplicate files and large unnecessary files).

Warning: Some "optimizers" (for example, Clean Master or DU Speed Booster) aggressively remove background processes, which can lead to increased battery consumption. This happens because Android is forced to constantly restart closed applications. On Galaxy A40 with its modest processor Exynos 7904 this is especially noticeable.

If you still decide to use a third-party utility, follow rules:

• ✅ Download only from Google Play (avoid APKs from unknown sites).
• ✅ Before cleaning, read which files the app will delete.
• ❌ Do not give applications permissions Administrator or Accessibility unnecessarily.

6. What to do if, after clearing the cache, the phone began to perform worse?

In rare cases, users Galaxy A40 face the opposite effect: after clearing the cache, the phone begins to slow down even more. This happens for several reasons:

1. Rebuilding the cache: Android recreates temporary files for applications, which temporarily loads the processor.
2. Errors in system files: If the cache has been damaged (for example, due to a sudden power outage), clearing it may reveal hidden problems.
3. Lack of memory: On Galaxy A40 with 64 GB of storage, after clearing the cache, background defragmentation may be activated, which briefly slows down operation.

Solutions:

• 🔄 Restart the phone —this will reset temporary processes.
• ⏳ Wait 10-15 minutes —let the system restore the necessary cache.
• 📉 Check CPU load v Settings → Device maintenance → Battery. If some application consumes >30%, force stop it.
• 🔧 Reset settings applications (without deleting data) via Settings → Applications → Three dots → Reset application settings.

⚠️ Attention: If, after clearing the cache, applications begin to close abnormally, try updating them via Google Play. Perhaps temporary files were hiding errors in the apps.

If the problem persists for more than a day, it is worth considering resetting to factory settings (but make a backup copy first!). On Galaxy A40 this is done through Settings → General settings → Reset → Data reset.

7. How to prevent rapid cache clogging?

To avoid clearing the cache every week, follow simple rules:

• 📵 Limit background activity of applications: Go to Settings → Applications, select the app → Mobile data → Background data and disable unnecessary ones.
• 🔄 Update applications: Older versions of apps often create more temporary files. Enable auto-update in Google Play.
• 🗑️ Delete unused applications: Even without starting, they can accumulate cache. Check the list in Settings → Applications → Unused.
• 📴 Use “Lite” versions of applications: For example, Facebook Lite or Messenger Lite occupies in 2-3 times less space than their “full-fledged” counterparts.

The Galaxy A40 also has a hidden function Adaptive batterythat limits the background activity of rarely used applications. It turns on like this:

1. Settings → Device maintenance → Battery.
2. Tap on three dots → Settings.
3. Enable Adaptive Battery and Charging Optimization.

These settings will not only save battery, but also reduce the amount of unnecessary cache created by background processes.

FAQ: Frequently asked questions about clearing the cache on Samsung A40

adb shell pm trim-caches -1