The mobile operating system Android is built on the Linux kernel, which provides it with high reliability and flexibility, but creates certain barriers for the average user. By default, access to the root directory and critical sections of the file system is strictly limited by Google's security policies. This is done in order to prevent accidental deletion of system libraries or configuration files that could lead to device inoperability.
However, for advanced users, developers or modding enthusiasts, there is a need to look “under the hood” of the operating system. Viewing system files may be necessary to clear the cache of specific services, migrate configurations, or analyze the operation of background processes. In this article, we will look in detail at how to bypass standard interface restrictions and gain access to hidden data, using both standard tools and specialized software.
It is worth noting right away that manipulating the system partition carries certain risks. Incorrectly changing access rights or deleting a key file can cause a “bootlap” (cyclic reboot) or data loss. Therefore, before starting any work, it is strongly recommended to create a complete backup copy of the device.
Standard restrictions of the Android file system
Security architecture Android is based on the principle of separation of access rights. Each application runs in its own sandboxed environment and is not allowed to read or write data from other applications or the system without explicit permission. The system partition where the firmware files are stored is mounted by default in read-only mode (read-only) for the average user.
When you connect your smartphone to a computer via a USB cable, the MTP (Media Transfer Protocol) shows only a limited part of the file system. You see folders for media, downloads, and application data that allow external access. Deep system directories such as /system, /data or /vendorremain hidden from the eyes of Windows or macOS Explorer.
⚠️ Warning: Attempts to access system files through vulnerabilities in older versions of Android may void the device's warranty. Modern versions of the system (Android 10 and higher) have enhanced protection SELinuxthat blocks unauthorized access.
To bypass these restrictions, there are various methods, from using special file managers to connecting through a debug bridge. The choice of a specific method depends on your goals: do you just need to look at the folder structure or make changes to the configuration.
Using advanced file managers without Root
The easiest and safest way to see more than what the standard Explorer shows is to install a specialized file manager from Google Play. Applications like MT Manager, Solid Explorer or FX File Explorer have built-in mechanisms for working with hidden directories using special system permissions.
After installing such a manager, when you try to enter the root folder or system partition, the application will request special permission. In modern versions of Android, this is implemented through the storage access API (SAF). You must confirm access in the system dialog, after which the manager will be able to display the contents of folders that are usually hidden.
However, even with such apps, access to writing to the section without superuser rights ( /system without superuser rights (Root) often remains closed. You will be able to view files and copy them from there, but you will not be able to delete or edit them directly. This limitation is fundamental to the security of the OS.
- 📂 MT Manager - a powerful tool for advanced users that allows you to edit APK files and work with system partitions.
- 🔍 Solid Explorer - has a modern interface and supports connecting to cloud storage, as well as access to hidden folders via SAF.
- 🛠️ FX File Explorer - offers the "Root Explorer" function (if available rights) and convenient network access to files.
If the file manager does not see the /Android/data folder, try turning on the display of hidden files in the settings of the application itself or use the "Access to special folders" function in the Android settings.
Setting up the display of hidden files in the standard explorer
Many users do not know that even standard Explorers preinstalled by smartphone manufacturers (Xiaomi, Samsung, OnePlus) have the function of displaying hidden elements. Often files starting with a dot (for example, .nomedia) are simply not visible in normal viewing mode.
To activate this function, you need to go to the settings of the “Files” or “File Manager” application itself. Usually this item is located in the menu, called up by three dots in the corner of the screen, and is called “Show hidden files” or “Display settings”. After enabling the checkbox, you will see additional application configuration files.
This method will not give access to protected system partitions, but will help you find hidden folders with messenger caches, game settings or temporary update files that take up space in the device memory. This is the first step to understanding the data storage structure on your smartphone.
| Folder | Location | Purpose | Can I delete? |
|---|---|---|---|
.thumbnails |
/DCIM/ |
Gallery thumbnail cache | Yes (will be created again) |
.nomedia |
Different folders | Hides media from the gallery | No (duplicates will appear in the gallery) |
Android/obb |
Internal memory | Cache of heavy games | Only if the game is uninstalled |
MIUI/.cache |
Memory root | System shell cache | With caution |
Standard Explorer allows you to see only user hidden files, but does not give access to protected kernel system directories.
Access via ADB (Android Debug Bridge) from a computer
For those who need real access to the file system without obtaining root access, the ideal tool is ADB. This is an official utility from Google, included in Android SDK Platform-Tools. It allows you to control the device from a computer via the command line, with rights exceeding those of a regular application.
To get started, you need to activate “Developer Mode” on your smartphone. Go to Settings → About phone and quickly click 7 times on the "Build number" item. After this, a new section “For Developers” will appear in the settings menu, where you need to enable “USB Debugging.”
Connect your smartphone to the PC and enter the command to test the connection. If everything is configured correctly, you will have access to the device shell. The command adb shell switches the terminal to smartphone control mode, allowing you to execute Linux commands.
adb devices
adb shell
ls -la /system
Using ADB, you can view the contents of almost any folders, including /system and /data (partially). However, you still won’t be able to write a file to the system partition without Root - an error will occur Permission denied. However, for analyzing logs, viewing lists of installed packages, or retrieving application databases, this method is indispensable.
⚠️ Attention: The ADB command line interface does not have graphical protection. Entering an erroneous command, such as
rm -rfin the wrong directory, can permanently delete important data instantly.
How to install ADB on Windows?
Download the Platform Tools archive from the official Google website. Unpack it into a convenient folder (for example, C:\adb). Open a command prompt in this folder (Shift + Right mouse button → Open PowerShell or CMD window here) and enter the commands.
Full access with root access: risks and opportunities
The only way to gain full control over the file system, including write and delete rights on the partition /system is to get superuser rights (Root). To do this, use utilities like Magisk or KernelSU, which modify the system bootloader.
After rooting, any advanced file manager (for example, Root Explorer or the same MT Manager) will be able to mount system partition in read-write mode (R/W). You will be able to remove pre-installed bundleware (advertising applications from the manufacturer), replace system fonts, icons, and even edit kernel configuration files.
However, this procedure has serious consequences. First, it will void the device's warranty. Secondly, many banking applications and services (Google Pay, Mir Pay) stop working due to security reasons and the presence of root access. For their operation, additional manipulations are required to hide the root.
- 🔓 Full control —the ability to delete any system applications, freeing up space.
- 🎨 Customization —in-depth interface customization that is not available with standard tools.
- ⚠️ Risk of blocking —an error when deleting a system file can turn the phone into a brick.
☑️ Preparing to obtain root access
Analysis of system logs and diagnostic files
Often, by “viewing system files” users mean the need to diagnose problems. Android has many log files that record system history, application errors, and network failures. These files are stored in special buffers.
To view such data, it is not necessary to delve into the file system. The engineering menu or special applications (for example, MatLog for devices with Root or BugReport) allow you to download the current log in a readable format. Log files usually have the extension .log or .txt and contain technical information for developers.
It is also worth mentioning the file build.prop, which is located in the root of the system partition. This is a text file containing Android build properties: device model, OS version, pixel density and other parameters. Editing it (only with Root) allows you to fool some applications or change the behavior of the system, but requires extreme caution.
⚠️ Attention: The file
build.propis critical for booting the system. Changing the syntax or removing key lines will cause the phone to not turn on. Always save the original copy before editing.
If your goal is simply to find out the kernel version or build number, doing this through a file manager is unnecessary. Just go to the standard menu Settings → About phone, where all this information is presented in a convenient form.
To diagnose problems, it is easier to use engineering codes (for example, ##4636##) or applications for collecting logs than to manually search for files in the system folders.
Is it safe to delete files from the /data/tombstones folder?
The folder tombstones contains reports of application failures (crashes). These files are created automatically when apps crash. They can be safely removed; they do not affect the operation of the system, but only take up space. However, they can be useful for developers to fix errors.
What to do if, after deleting the system file, the phone does not turn on?
If the device is stuck on the logo, you will need to enter Recovery mode. If you have a custom recovery (TWRP), you can try restoring the file from a backup or flashing the system. In the case of stock recovery, often only a full reset (Wipe Data) helps, which will delete all user data.
Is it possible to view system files on Android without a computer?
Yes, this is possible using file manager applications with Root support or special SAF permissions. However, for in-depth analysis, editing system configs or working with ADB commands, a computer is much more convenient and reliable.
Where are Wi-Fi passwords stored in system files?
On devices with root access, saved networks and passwords are stored in a file /data/misc/wifi/wpa_supplicant.conf. Without superuser rights, access to this file is denied for security purposes so that attackers cannot steal saved credentials.