The internal storage of a modern smartphone often resembles a black box: you see that space is running out, but you don’t understand where exactly the gigabytes have disappeared. The operating system Android has a complex file structure that protects system files from accidental deletion by the user, but at the same time makes it difficult to access personal data for cleaning. Understanding how to “get into” this memory is the key to speeding up the device and freeing up valuable space.
There are several levels of data access: from simple browsing through a standard file manager to deep penetration using computer utilities or root access. We will analyze all available methods - from the most secure to advanced, which allow you to see hidden directories and clean up garbage that takes up up to 30% of the drive's volume.
Regardless of the model of your device, be it budget Xiaomi Redmi or flagship Samsung Galaxy, the principles of memory organization remain similar. However, the interface and names of menu items may differ slightly depending on the firmware version and the installed shell.
Standard access through file managers
The easiest and safest way to get into the phone's memory is to use built-in tools. Almost every device comes pre-installed Explorer or the Files application. This tool gives access to the user's section of internal memory, where photos, downloads and documents are stored.
To enter, just open the application and select Internal memory or Internal Storage. Here you will see the main folders, such as DCIM (photos), Download (downloads) and Documents. Deleting files from here will not harm the system, but requires care so as not to erase important data.
If there is no standard application or its functionality does not suit you, you can always install an alternative from Google Play Store. Third-party managers, such as Files by Google or Solid Explorer, often provide a more convenient interface and additional tools for analyzing used space.
⚠️ Attention: Never delete folders with the names of system applications (for example,
com.android...unless you are sure 100% in their purpose. This can lead to app malfunctions.
Use the "Storage Analysis" function in file managers to visually see which types of files take up the most space.
Connecting to a computer for in-depth analysis
When the smartphone screen is too small for comfortable navigation, or need to move huge amounts of data, a connection to a PC becomes indispensable. This method allows you to see the file system as a regular removable disk and manage it using familiar tools Windows or macOS.
To get into memory in this way, connect your phone and computer with a USB cable. It is critical to change the USB operating mode: by default, the device charges frequently without transferring data. You need to lower the notification shade on your phone and select the mode MTP (Media Transfer Protocol) or File transfer.
After connecting, a new device will appear in “My Computer”. By opening it, you will have access to the root directory of the internal memory. Here you can bulk delete duplicates, sort archives, and move media files to your hard drive to free up space.
- 📁 Use sort by size in Windows Explorer to instantly find the heaviest files.
- 🔌 Make sure the USB cable is working and supports data transfer, not just charging.
- 💻 On computers with macOS, you may need to install the utility Android File Transfer for it to work correctly.
Using USB and ADB debugging mode
For users who need access to system partitions or the ability to execute complex cleaning scripts, there is a tool ADB (Android Debug Bridge). This is a powerful command line interface that allows you to control the device from your computer at a deep level without the need for root access.
To activate this mode, you must enable Developer Menu. Go to Settings → About phone and quickly click 7 times on the item Build number. After this, a new section “For Developers” will appear in the settings menu, where you need to activate the toggle switch USB debugging.
After connecting to a PC With the ADB platform tool installed, you can enter commands to view the memory structure. For example, the command adb shell ls -l /sdcard will display a list of files in the internal storage. This allows you to find hidden files that are not displayed in regular Explorer.
adb shell dumpsys meminfoThis command will show detailed information about how much RAM and storage memory each application consumes. This is an indispensable tool for finding resource “eaters” that are not visible in the standard settings menu.
⚠️ Attention: Commands in ADB are executed instantly and without confirmation. An error in the syntax when deleting system files can turn the phone into a “brick.”
Where to download ADB?
The official Platform Tools package is available on the Android developers website. Unzip the archive into a convenient folder and run the command line from this directory.
Features of working with an SD memory card
Many users expand their smartphone memory using cards microSD. However, Android treats them in two ways: as portable storage or as part of the internal memory. Understanding this difference is critical for proper file access.
If the card is configured as portable storage, it appears separately in Explorer. You can take it out and read it on your computer via a card reader. The files on it are in the public domain, and managing them is no different from working with a flash drive.
In the Internal memory (Adoptable Storage) mode, the system encrypts the card and combines it with the main drive. In this case, you won’t be able to directly access the files on the card through a computer—they will be encrypted with the keys of a specific device. Access to them is possible only through the file manager of the smartphone itself.
| Operating mode | Access from PC | Encryption | Transfer to another phone |
|---|---|---|---|
| Portable storage | Direct access | Absent | Possible |
| Internal memory | Only via phone | Full | Impossible without formatting |
| Hybrid mode | Partial | Custom | Files only media |
If errors occur when reading a memory card, the system may prompt you to format it. Please note that this action will completely delete all data. Always make a backup copy of important files before changing the operating mode of the drive.
The “Internal memory” mode speeds up the operation of applications installed on the card, but makes it impossible to quickly transfer data to another phone.
Hidden folders and system junk
A significant part of the memory is occupied by files that are hidden from the user’s eyes default. In the Android file system, such folders and files begin with a dot (for example, .thumbnails or .cache). They often contain a cache of image thumbnails or temporary application data.
To see these objects in the standard Explorer, you need to go to the settings of the application itself and activate the option Show hidden files. After this, you will find many directories created by messengers, browsers and social networks.
Particular attention should be paid to the folder Android/obb i Android/data. Cache files of heavy games and application data are stored here. Deleting the contents of these folders may cause games to stop launching and require re-downloading resources.
- 🗑️ The folder
.thumbnailscan grow to several gigabytes, storing thumbnails of all photos ever viewed. - 📱 Messengers like Telegram or WhatsApp create separate folders for each chat with media files.
- 🌐 Browsers save site caches in hidden system directories that are rarely cleared automatically.
⚠️ Attention: Settings interfaces and folder paths may change with Android updates. Check the current paths in the official documentation of your OS version if standard methods do not work.
☑️ Safely clearing the cache
Radical measures: Root access and third-party utilities
For complete control over memory, some users resort to receiving root access. This gives superuser status and opens access to all sections of the system, including those that cannot be accessed even through ADB without special training.
With root access you can use powerful utilities like Root Explorer or Titanium Backup. They allow you not only to see, but also to modify system files, remove pre-installed applications (bloatware) and transfer any apps to a memory card.
However, this method is associated with high risks. An incorrect action can compromise the integrity of the system, lead to loss of warranty and blocking banking applications that refuse to work on rooted devices for security reasons.
If you are not an experienced user, it is better to limit yourself to using cleaning applications that do not require root, but can deeply analyze the storage, for example SD Maid. They find remnants of deleted applications and empty folders, safely freeing up space.
What is Magisk?
This is a modern tool for obtaining root access that allows you to hide the fact of system modification from security applications and banks.
Frequently asked questions (FAQ)
Why phone memory fills up even if I don’t download anything?
This happens due to the application cache, the accumulation of system logs and the automatic saving of media files from instant messengers. Also, system updates can create temporary installation files.
Is it possible to delete the Android folder completely?
No, you cannot delete the entire folder Android as it stores critical data for the operation of installed applications. You can only clear the contents of subfolders cache inside it.
How to transfer all applications to a memory card?
In modern versions of Android, this function is limited. You can only transfer those applications whose developers have explicitly allowed this in the app manifest. It is impossible to completely transfer the system or all applications without root access.
Is it safe to use cleaner applications from the Play Market?
Most popular cleaners are safe for user files, but they often contain advertising and can aggressively close background processes, which paradoxically increases battery consumption. It is better to use built-in cleaning tools.