Modern smartphones are becoming the center of our digital lives, processing gigabytes of data every day. Over time, this inevitably leads to a slower interface, long application launches, and annoying notifications about low space. Users often confuse the concepts of random access memory (RAM) and internal storage (ROM), although the methods for clearing them are radically different.
Understanding the difference between these types of memory is the first step to properly optimizing your device. Clearing your cache helps free up storage space without deleting your personal photos or documents. At the same time, freeing up RAM allows you to run demanding games without freezing. In this article, we will analyze all the ways to clean up digital garbage, using only the system’s built-in tools and proven methods.
Analysis of storage fullness before cleaning
Before deleting anything, you need to determine exactly which files take up the lion's share of space. Standard Android tools provide visual statistics, but many users ignore this step, deleting important data at random. A competent analysis allows you to identify hidden folders with logs or forgotten downloads.
First, go to the menu Settings → Storage. Here the system will automatically distribute files into categories: images, videos, audio, documents and applications. Pay attention to the “Miscellaneous” or “Other” section - remnants of uninstalled apps and temporary update files often accumulate there.
Use the built-in analysis tool to sort applications by size. It often happens that messengers like Telegram or WhatsApp take up tens of gigabytes due to the saved media history. By clicking on a specific application in the list, you will see a detailed breakdown: how much space is occupied by the app code itself, and how much by user data and cache.
Pay attention to the Download folder in the file manager - installation APK files and advertising banners are often stored there for years, which can be safely deleted.
You should not rely only on a visual assessment. Some files may be hidden from the standard Explorer. For in-depth analysis, it is recommended to use specialized utilities that show the directory structure in the form of a tree. This will help you find duplicate photos or heavy archives that you might have forgotten existed.
Clearing the cache of individual applications and the system
Cache is temporary data that applications save to speed up their work. For example, the browser stores copies of visited pages, and maps store fragments of the area. Over time, this buffer grows to enormous sizes, ceasing to be useful and only taking up space.
To clear the cache of a specific app, follow the path Settings → Applications. Select the desired application from the list and click on “Storage”. You will see two buttons: “Clear cache” and “Clear data”. It is important not to confuse them: the first deletes only temporary files, the second resets the application to factory settings, deleting logins and progress.
In older versions of Android there was a “Clear cache” button for all applications at once. In modern shells, such as One UI ot Samsung or MIUI ot Xiaomi, this function is often hidden in the device optimization menu. However, the manual method through the settings of each application remains the most reliable way of control.
☑️ Correctly clearing the cache
The system cache also requires attention, especially after major firmware updates. In Recovery Mode, you can execute the command Wipe Cache Partition. This is safe for personal data, but requires rebooting into a special mode by holding down the button combination Volume Up + Power.
What is Dalvik Cache?
This is a special cache section containing optimized application files for the processor. Clearing it may slightly slow down the first launch of apps after a reboot, but often solves problems with artifacts on the screen.
⚠️ Attention: Never select the item
Wipe Data/Factory Resetin Recovery mode if your goal is simply to clear the cache. This action will completely delete all your contacts, photos and applications, returning the phone to its factory state.
Managing random access memory (RAM) and background processes
RAM is responsible for multitasking the device. When you minimize an application, it does not close completely, but goes into the background, remaining in RAM. Running out of RAM causes the system to forcefully close applications, causing them to restart the next time they are opened.
Enabling Developer Mode gives you access to advanced memory management. To activate it, find the “Build number” item in the About phone section and click on it 7 times in a row. After this, a new section will appear in the main settings For developers.
In this menu you can find the item “Background process limit”. By default it is set to the standard value, but it can be limited to, for example, 2-3 processes. This will force the system to more aggressively unload applications from memory, freeing up resources for the active task.
Also in the developers menu, the “Start services” function is available. It shows a list of all active processes and the amount of RAM they are consuming. Here you can forcefully stop hung services that are not closed in the usual way.
| Memory type | Purpose | What is safe to delete | Risk of data loss |
|---|---|---|---|
| Internal (ROM) | Storing photos, applications, system | Cache, downloads, duplicates | High (when deleting data) |
| Running (RAM) | Launch active applications | Background processes | Low (only unfinished tasks) |
| SD card | Storage expansion | Media files, documents | Medium (depends on the content) |
Working with junk files and residual software
When deleting applications using standard means, empty folders and configuration files are often left on the disk. This “digital loop” can take up hundreds of megabytes over the years of using a smartphone. To combat it, more advanced methods are required than a simple recycle bin.
File managers with an analysis function, such as Files by Google or built-in explorers from manufacturers, can find residual files. Look for folders with the names of deleted games or apps in the root of the internal memory. Often there are error logs or temporary archives.
Pay special attention to the folder Android/obb i Android/data. This is where cached data from games and heavy applications is stored. If you delete a game, but the folder with its name remains, you can erase it manually. However, be careful: deleting files from active application folders will result in loss of progress or the need to download resources again.
Manually cleaning the Android/data and obb folders requires care - delete only those directories whose names match the already deleted applications.
Using ADB (Android Debug Bridge) through a computer allows you to perform deep cleaning of system garbage that is inaccessible without root access. The command pm trim-caches (on Android 11 and higher) allows you to trim the cache of all applications to a specified limit.
adb shell pm trim-caches 999999999This command requests the system to delete the maximum possible cache size. This is a safe operation that does not require superuser rights, but it only works on relatively new versions of the operating system.
Optimizing media files and transferring data
Photos and videos are the main consumers of space in a modern smartphone. Cameras with resolutions of 48, 64 and 108 megapixels produce huge files. Without regularly revising your gallery, space will run out very quickly, no matter how much cache you clear.
Use the “Free up space” function in the application Google Photos. It finds pictures that have already been uploaded to the cloud storage and deletes their local copy from the device. This allows you to store thousands of photos in original quality without taking up a single byte of internal memory.
If cloud services are not suitable for you, consider transferring media to a microSD memory card. In the camera settings, you can immediately set to save new pictures to external storage. For old files, use a file manager to batch move folders DCIM i Pictures.
⚠️ Attention: When transferring files to an SD card, make sure it has a high speed class (U3 or V30). Slow cards may cause delays when shooting high-resolution videos or stuttering when viewing a gallery.
Don't forget about video files. One minute 4K video can weigh more than a thousand photos. Browse the “Video” section of your storage and ruthlessly delete unsuccessful takes or old recordings that you have already sent to friends.
Use cloud messengers to transfer large files instead of saving them to your phone memory. Send the file to yourself in “Favorites”, and then delete it from the gallery.
Radical methods: reset and flashing
When software cleaning does not give the desired result and the smartphone continues to work slowly, the last argument remains - a full reset to factory settings. This deletes absolutely all user data, returning the device to a "as-stored" state.
Before performing this procedure, it is critical to create a full backup. Use Google's built-in backup tool or the manufacturer's proprietary utility (for example Samsung Smart Switch or Mi Cloud). Save contacts, messages and the list of applications.
Reset is performed through the menu Settings → System → Reset settings → Delete all data. The process may take from 10 to 30 minutes depending on the amount of memory and drive speed. After rebooting, you will get a clean system without software garbage accumulated over years of use.
⚠️ Attention: Make sure you remember the password for your Google account. After the reset, the phone will ask for this data to verify ownership (FRP protection). Without them, the device will turn into a “brick.”
In the most advanced cases, when even a reset does not help due to errors in the system partition, flashing the device via a computer is required. This is a complex procedure that requires unlocking the bootloader and using specific software like Odin or Fastboot. For beginners, it is better to entrust this matter to the service center specialists.
Why does the phone heat up after a reset?
In the first hours after a full reset, the system carries out deep indexing of files and optimization of applications in the background. This is a normal phenomenon that goes away on its own after 1-2 days of active use.
Frequently asked questions (FAQ)
Is it safe to use cleaning applications from the Play Market?
Most popular cleaners (Clean Master, CCleaner and analogues) really work, but often do more harm than good. They aggressively unload applications from memory, which forces the processor to waste extra energy launching them again, reducing battery life. Built-in Android tools are usually enough to maintain order.
Why does the application run slower after clearing the cache?
This is a normal reaction. The cache is designed to speed up: the next time the application is launched, it will have to re-download data from the Internet or from disk, process graphics and build interfaces. After a few minutes of use, the speed will be restored, but the disk space will remain free.
Is it possible to delete the Android folder completely?
Absolutely not. The folder Android contains system data necessary for the operation of all installed apps. Deleting this directory will cause the system to crash, application icons to disappear, and they will be unable to launch. You can only delete the contents of specific subfolders inside it related to deleted games.
How to clear the cache if the phone does not turn on?
If the system does not boot, you can try entering Recovery mode. To do this, you need to turn off the phone and hold down the button combination (usually Volume Up + Power). In the menu that appears, select Wipe Cache Partition. This will clear the system cache without affecting personal files, and can help solve boot problems.
Does clearing memory affect battery life?
Indirectly, yes. Full memory forces the drive controller to work harder to find free space for recording, which increases power consumption. In addition, background processes that cannot unload due to lack of RAM constantly wake up the processor, preventing the phone from going into deep sleep.