The situation when a internal memory smartphone suddenly runs out is familiar to almost every user Android. Low space notifications appear at the worst possible times, blocking you from installing updates, taking new photos, or downloading important files. The system begins to work slower, and applications may crash for no apparent reason.
The problem often lies not in the storage capacity, but in the way the operating system manages files. Over time, gigabytes caches, residual files of deleted apps and duplicate media accumulate. To regain free space, it is necessary to carry out comprehensive diagnostics and consistent cleaning of the device, using both built-in tools and specialized utilities.
In this article we will analyze effective methods for freeing up space, ranging from basic cleaning of system garbage to radical measures like resetting settings. You will find out which folders can be deleted without danger, and which folders are strictly prohibited to touch so as not to disrupt the work Android OS.
Analysis of storage fullness
Before you start deleting anything, it is critically important to understand what exactly is taking up precious gigabytes. In modern shells from Samsung, Xiaomi or Google a memory analyzer is built-in, which clearly shows the data distribution. Go to the menu Settings → Storage (or Memory) to see a detailed breakdown by category.
Usually the lion's share of space is taken up by applications and their data, especially messengers like Telegram or WhatsAppthat cache all viewed media files. System files and other things can also become bloated due to error logs or incomplete downloads. Visualization helps quickly identify space “eaters.”
⚠️ Attention: If the “Other” or “System Data” category takes up an abnormally large amount of space (more 10-15 GB), this may indicate a file system failure or an accumulation of temporary update files that were not automatically deleted.
Do not ignore the section with downloaded files. Often, users download installation APK files, archives or documents that were needed once, but continue to be stored in the folder Download. Deleting them is safe and instantly frees up space.
Clearing the application cache and system garbage
The fastest way to get memory back is to clear the cache. Every installed application creates temporary files to speed things up, but over time this cache becomes redundant. Go to Settings → Applications, select a heavy application (for example, a browser or a social network) and click Storage → Clear cache.
It is important not to confuse the “Clear cache” button with the “Clear data” button. The second option will completely reset the app to its factory state, deleting your logins, settings, and saved information within it. Use it only in extreme cases when the app does not work correctly.
- 🗑️ The browser cache often takes up several gigabytes due to saved thumbnails of sites and videos.
- 📸 Gallery and photo editors store thumbnails of processed images that can be safely deleted.
- 🎵 Music and video streaming services cache for offline viewing, check the settings of these applications.
For system cleaning, many manufacturers offer built-in utilities, for example, “Optimizer” or “Security”. Running such a app allows you to delete temporary files, remnants of advertising and empty folders. However, third-party “cleaners” from the Play Market store are often less effective and contain a lot of advertising.
Regularly rebooting the smartphone (every 3-4 days) helps the system automatically delete some temporary files and frozen processes, freeing up RAM and internal memory.
Transferring applications and media files to a memory card
If your smartphone supports installing cards memory microSD, this is a great way to relieve internal storage. Although modern versions Android limit the ability to transfer the applications themselves, you can move media files without any problems. Photos, videos, music and documents should be transferred to external media.
To transfer files, use the built-in file manager. Select the desired folders (for example DCIM, Pictures, Music) and select the “Move” or “Copy” option, specifying the memory card as the destination. After successful transfer, delete the originals from the internal memory.
| Data type | Can transfer to SD? | Recommended method | Risks |
|---|---|---|---|
| Photos and Videos | Yes | File manager | Data loss when the card breaks |
| Music and Documents | Yes | File manager | No encryption |
| Applications (completely) | Partly | Developer settings | Unstable operation of applications |
| System files | No | Impossible | Critical system failure |
Exists the Adaptive Memory (or Internal Memory) feature, which formats the memory card as an extension of the internal storage. This allows applications to be installed on the card, but makes it unreadable on other devices. Use this option with caution, as applications will stop working when the card is removed.
☑️ Preparing to transfer data
Deleting duplicates and unnecessary files
Over the years of using a smartphone, duplicates inevitably accumulate in the memory. These could be identical photos taken in burst mode, or the same documents uploaded several times. Manually searching for such files takes hours, so it is better to use specialized tools.
The application Google Files has a built-in function for searching for duplicates and large files. It scans your storage and offers to delete copies of images, as well as files that you haven't opened for a long time. This is a safe way to get back a few gigabytes of space without the risk of deleting something important.
Pay attention to the folder Telegram or WhatsApp in the file manager. They often store thousands of received images and videos inside them, even if you didn't save them to a gallery. Cleaning these folders through the settings of the messenger itself (section “Data and memory”) is much more effective than manually deleting files.
⚠️ Attention: Before mass deleting files from messenger folders, make sure that there are no important documents or work materials that you may need in the future.
It is also worth checking the trash in the gallery. Deleted photos often do not disappear immediately, but are moved to the trash, where they are stored for another 30 days, continuing to take up space. Emptying the Trash is the final step in the process of deleting media files.
Hidden folders.thumbnails
On Android, there is a hidden folder.thumbnails that stores thumbnails of all your photos and videos. Over time, it can grow to several gigabytes. It can be deleted through the file manager with the “Show hidden files” option enabled, but the system will create it again over time.
Using cloud storage
A modern approach to memory management involves refusing to store everything locally. Cloud services, such as Google Photos, Yandex.Disk or Dropbox, allow you to store an unlimited number of pictures and videos on the Internet, freeing up space on your device.
Function “Free up space” in the app Google Photos automatically finds all the pictures that have already been uploaded to the cloud and deletes their local copies from the phone. You can still view them in the app, but they no longer take up internal storage. This is the perfect balance between accessibility and space saving.
Set up automatic uploading (backup) for all new photos and videos. In this case, you will no longer have to worry about running out of memory, since the files will be sent to the cloud immediately after creation. To access them you only need an Internet connection.
Cloud storage is not just a backup, but an active memory management tool that allows you to turn a 64 GB phone into a device with virtually unlimited media storage.
Resetting settings as a radical method
If none of the above methods helped to get back enough memory, the system may be deeply clogged residual files or logically damaged. In this case, the only effective solution is a full reset to factory settings (Hard Reset).
This procedure completely deletes all data from the internal storage, returning the phone to the “as from the store” state. Before doing this, be sure to create a complete backup of your contacts, messages and important files on your computer or in the cloud, since it will be impossible to restore them after a reset without a backup.
To perform a reset, go to Settings → System → Reset settings → Delete all data. The process may take from 10 to 30 minutes depending on the amount of memory and processor speed. After turning on, the phone will be clean, with the maximum available internal memory.
⚠️ Attention: Make sure the battery charge is at least 50% before starting the reset. Interrupting the process by turning off the phone can lead to software failure and the need to reflash the device in the service.
After the reset, do not rush to restore all applications at once from a backup copy. Install only the essentials and watch how quickly the memory fills up. Often the problem lies in one specific application that does not work correctly after the update.
Frequently asked questions (FAQ)
Why does the memory fill up by itself immediately after cleaning?
This happens due to system processes and applications that immediately begin to create new cache files and logs. Messenger apps that automatically download new media files in the background may also be the culprits. Check your startup settings in Telegram and WhatsApp.
Is it possible to delete files from the Android/data folder?
You can delete files from this folder, but with caution. Application-specific data is stored there. Deleting a subfolder of a specific application will reset its settings and may delete downloaded content (for example, maps in the navigator or levels in the game). Do this only if you are sure that you do not need the data.
Does full memory affect the speed of the phone?
Yes, it does critically. When free space is less than 10-15%, the operating system cannot effectively use the page file and create temporary files. This leads to severe interface lag, long application opening times, and sudden reboots.
How to find out which application is hiding its real size?
Some applications may incorrectly display the size in the standard menu. For accurate diagnostics, use third-party disk analysis utilities, such as DiskUsage or Storage Analyzer. They visualize the file system and show the real size of each folder, including hidden ones.