Smartphones series Samsung Galaxy J4, despite their age, remain popular due to their reliability and ease of use. However, over time, users often experience slowdowns in the interface, sudden application freezes, or a lack of free memory space. The main cause of such problems is the accumulation of temporary files that the system and apps save to speed up data loading.
This temporary data is called cache. They help applications launch faster, but if they are excessive or damaged, they begin to slow down the device. Correctly clearing the cache on Android allows you to return to its former speed without losing personal photos, contacts or messages. In this material, we will analyze in detail all the safe ways to delete temporary files.
The cleaning procedure does not require special technical skills, but it is important to understand the difference between cleaning a specific application and completely clearing the system cache partition. Incorrect steps may result in a factory reset, so follow the instructions carefully. We will look at both software methods through the settings menu and hardware methods through recovery mode.
What is cache and why it needs to be cleared on Samsung J4
Cache memory is a special buffer that stores temporary data that is often used by the processor or applications. When you open a browser or social network, the phone downloads images and scripts, saving copies of them. The next time you visit the same page, the device takes data from cacherather than downloading it again from the Internet.
Over time, the volume of such files can reach several gigabytes. On models like Samsung Galaxy J4, where the amount of internal memory is often limited to 16 or 32 GB, this becomes critical. The system begins to work slower because it has to index a huge number of junk files.
In addition, cache files may become damaged. If an application stores incorrect data, it may crash on startup or function incorrectly. Clearing solves this problem by forcing the app to create new, correct temporary files from scratch.
⚠️ Warning: Clearing the application cache is safe and does not delete your logins, passwords, or game progress. However, clearing the data (not to be confused with the cache) will completely reset the application to its factory state.
Regularly clearing the browser cache can increase privacy by deleting your browsing history and cookies that track your online activities.
Clearing the cache of individual applications through settings
The easiest and most A safe way to free up space is to delete the temporary files of a particular app that is consuming a lot of resources. This is especially true for heavy applications, such as Instagram, YouTube or instant messengers. You can select exactly those apps that cause the greatest suspicion of slowing down.
To perform this operation, you must go to the system menu. Navigation in the shell One UI or older versions Samsung Experience may differ slightly, but the general algorithm remains the same for the entire line Galaxy J. You will need to find the Application Manager.
Go to the Settingssection, then select Applications. Find the desired app in the list that opens. Click on it to open the information page. Here you will see a button Storage or Memory. By clicking on it, you will have access to file management.
- 📱 Press the button
Clear cacheto delete only temporary files. - 🗑️ Button
Clear datawill delete all application settings and require you to re-enter your account. - 📊 The total amount of busy data is displayed at the top of the screen memory and cache size.
Repeat this procedure for all resource-intensive apps. This will help identify the “culprit” of the brakes if the problem is caused by specific software. You should not abuse this function daily, as the system will need time to regenerate the cache.
Using the built-in device optimizer
The company Samsung has introduced a powerful built-in tool for system maintenance. On the model J4 this function is called “Optimization” or “Device Care”. It allows you to automatically analyze the memory state and prompt the user to delete unnecessary files.
This method is preferable for those who do not want to manually go through each application. The algorithm itself finds cache files that can be safely deleted, as well as residual files from deleted apps. The process takes only a few seconds and does not require deep knowledge of the structure Android.
To start optimization, find the application on the desktop or in the menu Settings. Scroll down the list to item Device Maintenance (or Optimization). Click the button Optimize now. The system will check the battery, memory and security.
Settings → Device Maintenance → Memory → Clean nowAfter completing the analysis, you can go to the section Memory inside the maintenance menu. There the system will show detailed statistics and offer to clear the cache of all applications with one button. This is the fastest way to get your phone in order before an important task.
⚠️ Attention: The built-in optimizer may not delete the cache of some Google system services to maintain the stability of synchronization.
The built-in optimization tool is the best choice for regular preventative maintenance of your smartphone once every a week.
Full cache clearing via Recovery mode
If the phone is extremely slow, freezes when loading, or standard methods do not help, a deeper cleaning is required. Mode Recovery allows you to clear the cache partition of the entire system (Wipe Cache Partition). This will not delete your personal data, but it will reset all temporary system files.
To enter this mode, you must use a combination of physical buttons. It is important to perform the actions quickly and accurately, since the download timer is limited. Make sure that the phone is completely turned off and not in sleep mode. Samsung Galaxy J4 you must use a combination of physical buttons. It is important to perform the actions quickly and accurately, since the download timer is limited. Make sure your phone is completely turned off and not in sleep mode.
Press simultaneously the Volume Upbutton, the Home button (the central button under the screen) and the Powerbutton. Hold them until the logo Samsungappears, then release the power button, but continue to hold the other two. When a menu appears with a blue or black background and text, the buttons can be released.
| Action | Button controls | Result |
|---|---|---|
| Move through the menu | Volume Up / Down | Cursor moves through items |
| Confirm selection | Power button | Activation of the selected item |
| Exit mode | Item Reboot system now | Reboot to normal mode |
Using the volume buttons, select item Wipe cache partition. Confirm your selection with the Power button. The system will ask you to confirm the action (Yes/No). Select Yes. The cleaning process will take a few seconds, after which a completion message will appear.
☑️ Preparing to enter Recovery
Clearing the cache in popular applications
Some applications have their own built-in settings for memory management, which work more efficiently than system tools. This is typical for browsers and instant messengers that store huge volumes of media files. Manual cleaning within the application gives more flexible control.
For example, in the browser Google Chrome or Samsung Internet you can choose to delete only images and files, leaving your browsing history and passwords intact. In messengers like Telegram or WhatsApp you can configure automatic clearing of the media file cache.
In Telegram go to Settings → Data and memory → Memory usage. There you will see a button Clear cache. A unique feature of this messenger is the ability to set a cache size limit so that it does not grow indefinitely.
Why Is Telegram cache so big?
Telegram stores all viewed photos and videos on the device for instant access. If you are a member of many channels, the cache can take up more than 5 GB per month of active use.
For browsers, the path usually looks like this: Settings → Privacy → Clear data. Here you can only check the boxes opposite the item Images and other files. This will free up space, but will preserve your bookmarks and saved logins.
⚠️ Warning: Clearing the cache inside the browser may cause some sites to It takes a little longer to load on your first visit after the procedure.
Cleaning automation and useful utilities
For users who want to forget about manual cleaning, there are third-party solutions. However, on smartphones Samsung installation of additional “cleaners” is often not required and can even harm performance due to their own work in the background.
The best solution is to set up automatic maintenance in the phone itself. In the menu Device maintenance you can enable the option Auto-optimization. The phone itself will clear the cache and close unused applications at a specified time, for example, at night.
If you still decide to use third-party software, choose only proven solutions, such as Files by Google. This is the official application from the developers Androidthat safely finds duplicates and temporary files. Avoid aggressive antiviruses with built-in cleaners that often show false notifications about “viruses” to attract attention.
- 🛡️ Use only official utilities from Google Play Market.
- ⚙️ Set up an automatic cleaning schedule in the system settings.
- 🚫 Avoid apps that promise "game acceleration" or "CPU cooling."
The Files by Google app has a "Cleanup" feature that offers to delete old screenshots and memes you've already viewed, saving space without the risk of deleting important ones.
Frequently asked questions and problems with cleaning
During maintenance Smartphone users often encounter unusual situations. Below are answers to the most popular questions related to clearing the cache on your device Samsung Galaxy J4. These recommendations will help you avoid errors and data loss.
Will clearing the cache delete my WhatsApp conversations?
No, clearing the cache (Clear Cache) only deletes temporary files, such as image thumbnails. Your correspondence, contacts and media files will be saved. Be careful and do not press the button Clear data (Clear Data, as this will delete everything.
The phone rebooted itself after clearing the cache in Recovery, is this normal?
Yes, this is standard system behavior. After executing the command Wipe cache partition the device automatically reboots to apply the changes and rebuild the system indexes. The first boot may take longer than usual.
Why does the cache quickly fill up again after clearing?
This is normal operation of the operating system Android. Applications constantly create new temporary files for their work. If the cache fills abnormally quickly (within a few hours), one of the applications may not be working correctly and requires updating or reinstalling.
Is it possible to clear the cache if the phone screen is broken and the sensor does not work?
Yes, if you have USB debugging enabled, you can use your computer and ADB commands. However, to enter Recovery mode on Samsung J4 physical buttons work independently of the sensor, so cleaning through Recovery is possible even with a broken screen.
Do you need to reset to factory settings if clearing the cache did not help?
Reset (Wipe Data/Factory Reset) - this is a last resort. If clearing the cache and optimization did not solve the problem of brakes, the reason may be memory wear or corruption of system files. In this case, resetting may help, but do not forget to backup your data.