Slow smartphone operation and constant notifications about lack of space are a familiar problem for many owners of devices based on Android. Over time, the gadget accumulates gigabytes of temporary data, forgotten installation files and duplicate photos, which critically affects system performance. Users often wonder which files are safe to delete, and which files should absolutely not be touched, so as not to turn the phone into a “brick.”
In this article, we will analyze in detail the storage structure of your device and draw up a step-by-step action plan. You will learn to distinguish system garbage from important documents, and also learn about hidden functions of the operating system that will help restore your smartphone to its former speed without buying a new model.
Storage analysis: searching for the main space eaters
Before you start thoughtlessly deleting files, you need to conduct a competent diagnosis of occupied space. Modern shells, such as One UI ot Samsung or MIUI ot Xiaomihave built-in analysis tools, but they do not always show the full picture. Go to the settings and find the section Memory or Storageto see a visualization of data distribution.
Most often, the lion's share of the volume is occupied not by the applications themselves, but by their data. Messengers like WhatsApp i Telegram save every received photo and video to local memory, even if you have already viewed them. Social networks cache news feeds, creating giant folders with temporary files that are rarely cleared automatically.
⚠️ Attention: Do not delete files from the system root directory manually through File Explorer unless you are 100% sure of their purpose. This may lead to a cyclic reboot of the device.
For deeper analysis, you can use third-party utilities, such as Files by Google or DiskUsage. These apps build a memory map where the size of the rectangles corresponds to the size of the files. This way you will instantly see forgotten movies or archives that have been taking up space for months.
Cleaning application cache and system garbage
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 loaded areas. Although the cache is useful, it becomes a problem when it grows to several gigabytes. Clearing the cache is safe and does not delete your logins, passwords or personal correspondence.
To clear the cache selectively, go to Settings → Applications. Select a heavy application, press Storage and then the Clear cachebutton. It is important not to confuse this button with the option Clear data, which will reset the application to its factory state, deleting all your history and settings inside it.
- 🗑️ The Chrome browser cache can take up to 1-2 GB after active surfing.
- 📸 Gallery and photo editors store thumbnails and temporary copies of processed images.
- 🎵 Streaming services like Spotify or YouTube Music cache listened music for offline mode.
The system cache can also be cleared through Recovery Mode, but this procedure requires caution. For the average user, regularly clearing the cache of individual heavy applications is sufficient. This action often solves the problem with interface “brakes” better than a complete reboot.
Clear the messenger cache once a month directly from their internal settings - there you can choose to delete only media files, saving the text history of the correspondence.
Deleting duplicates and unnecessary media files
Photos and videos - the most voluminous content on any smartphone. Often, users take several identical pictures in the hope of choosing the best one, but forget to delete the unsuccessful frames. In addition, screenshots of documents, receipts and correspondence tend to accumulate over the years, taking up precious space without any benefit.
Use the built-in Free Up Space tool found in the Google Photos or Gallery app. It automatically finds blurry photos, old screenshots, and large video files that you rarely watch. Before deleting, make sure that important files are saved in the cloud storage or on your computer.
| File type | Average size | Recommendation |
|---|---|---|
| 4K video (1 min) | ~300-400 MB | Transfer to PC or cloud |
| Serial photo (10 pcs) | ~50-80 MB | Leave 1-2 best, delete the rest |
| Screenshots | ~2-5 MB | Delete older than 1 month |
| Downloaded memes | ~1-3 MB | Ruthlessly delete |
Pay attention to the folder Download (Downloads). APK installation files, PDF documents and archives that were needed once often end up there. Regular revision of this folder can free up from 500 MB to several gigabytes of space.
☑️ Revision of media files
Uninstalling unused applications and games
Your smartphone often has applications installed that you have not used for the last six months. Not only do they take up space, but they can also run in the background, using up battery power and RAM. Games are especially resource-hungry: the installation files themselves can be light, but additional cache files (obb) often take up 2-5 GB.
Go to the list of all applications and sort them by date of last use or size. Without regret, remove apps whose purpose you no longer remember. If you rarely need the application, consider using its web version through a browser instead of installing a full-fledged client.
⚠️ Attention: When deleting system applications (for example, a standard calculator or voice recorder), make sure that you have an alternative, since restoring them without resetting the settings can be difficult.
Some manufacturers pre-install a lot of unnecessary stuff software that cannot be removed in the usual way. For such cases, you can use the command through a computer with ADB (Android Debug Bridge) installed. This allows you to disable system packages without gaining root privileges.
adb shell pm uninstall -k --user 0 package_nameHowever, use this method only if you are sure of the package name. Disabling critical system services may cause your phone to become unstable. For most users, a standard uninstallation through the settings is sufficient.
How to find the application package name?
Enable developer mode in the phone settings. Then download an application like "App Inspector" from the Play Market. Launch it, select the desired app, and you will see its full package name (for example, com.instagram.android), which must be entered into the ADB command.
Working with the “Other” folder and hidden files
In the storage settings, there is often a mysterious category “Other” or “System Files”, which can take up a significant amount of space. This is where application data that is not classified as cache or media is hidden, for example, messenger databases, offline maps and firmware update files.
One of the common reasons for the growth of this category is the remnants of deleted applications. When you uninstall a app, its settings and data folder sometimes remains in memory. This also includes error log files (logs), which are created by the system during failures.
To clear this area, you can use the function of resetting application settings without completely deleting them. This will return the apps to their original state, removing the accumulated "fat". Go to Settings → Applications, select the application and click Reset or Clear data.
Category “Other” often contains backups and logs - its safe reduction is possible only by clearing the data of specific applications or resetting the phone.
Transferring data to a memory card and to the cloud
If the internal memory is full and you can’t delete anything else, consider expanding the storage. Many smartphones support memory cards microSD. You can transfer photos, videos, music and documents to them, freeing up the internal storage for the system and applications.
In modern versions Android The memory card can be formatted as internal storage (Adoptable Storage). In this case, the system will perceive it as part of the main disk and will even be able to install applications there. However, this may slightly reduce the speed of apps compared to the built-in flash memory.
- ☁️ Use Google Photos to automatically upload photos to the cloud and then delete them from the device.
- 💾 Buy a U3 or V30 class memory card to record high-quality video without lag.
- 📂 Set up your file manager to automatically save new files directly to the SD card.
Cloud services such as Google Drive, Yandex Disk or Dropboxare also an excellent solution. They allow you to store files remotely and download them only when needed. This is especially true for documents and work files that do not require constant access without the Internet.
⚠️ Attention: When formatting a memory card as internal storage, all data on it will be destroyed. Be sure to back up your important files before starting the process.
Frequently asked questions (FAQ)
Is it safe to delete the Android/data folder?
The folder Android/data stores the data of installed applications. You cannot delete the entire folder - this will reset the settings of many apps. You can delete only subfolders of applications that you have already uninstalled, or clear the cache inside folders of specific games to free up space.
Why is there no free space after deleting files?
Check the trash in the Gallery or Files application. Deleted files are often moved there and stored for another 30 days. It is also possible that the system cache has not yet recalculated the free space - try rebooting your smartphone.
Is it possible to delete system firmware updates?
Downloaded update files are usually located in hidden system partitions. It is not recommended to delete them manually, as the system may try to download them again. It is better to wait until the update is installed, after which the old files will be replaced automatically.
How to clear the DNS cache on Android?
To clear the DNS cache, go to Settings → Applications, find the application responsible for network settings (often this is a system process), and clear its cache. Or simply turn on and off Airplane mode.
What should you do if the memory fills up on its own?
Most likely, the culprit is an application that saves a lot of data in the background (for example, a messenger or email client). Check the memory usage statistics in the settings to identify the culprit and limit its background activity or auto-loading media.