The appearance of the “Out of Memory” system notification on the screen of an Android smartphone means that the internal storage is filled to a critical level, which is why the operating system blocks the creation of temporary files necessary for launching applications and stable operation interface.
Users often wonder why memory runs out so quickly, even if they do not install new games or movies. The answer lies in the way modern applications work, which accumulate gigabytes of cache, as well as in the high-resolution photos and videos created by the camera. Understanding your storage structure is the first step to solving the problem.
In this article, we'll look at proven methods for freeing up space, from basic manual cleaning to using specialized tools. You will learn which files can be deleted without fear, and which files should absolutely not be touched, so as not to lose important data or disrupt the system.
Analysis of storage fullness
Before you start deleting files, you need to understand what exactly is taking up space on your device. Modern versions Android have a built-in powerful analysis tool that visualizes the distribution of data. Go to Settings → Storage (or Memory) to see a detailed chart.
The system usually groups data into categories: applications, images, video, audio, etc. It often turns out that the lion's share of space is occupied not by the apps themselves, but by their cache and downloaded files. For example, instant messengers can quietly consume tens of gigabytes, saving every picture and video viewed.
⚠️ Attention: Do not delete system files or folders with unclear names in the root of the internal memory through the file manager. This may lead to unstable operation OS or complete loss of data.
Pay attention to the “Miscellaneous” or “System Files” section. Sometimes “digital garbage” accumulates there - remnants of deleted apps or temporary update logs. If this category takes up an abnormally large amount of space (more than 10-15 GB), a deeper clean or reset may be needed.
Clearing the application cache and system garbage
The fastest way to free up space is clearing the application cache. A cache is temporary data that apps store to speed up their work, but over time it becomes redundant. It is important to understand the difference between clearing the cache and clearing data: the first is safe, the second deletes logins and settings.
For manual clearing, go to Settings → Applications. Select an application that takes up a lot of space (often browsers, social networks or YouTube) and click Storage. Here you will see a button Clear cache. Completing this procedure will not delete your accounts or correspondence.
- 🗑️ Browsers (Chrome, Samsung Internet) often store hundreds of megabytes of site cache and history downloads.
- 📸 Social networks (Instagram, TikTok, VK) save viewed feeds and thumbnails of images.
- 🗺️ Navigators (Google Maps, Yandex.Maps) cache map fragments for offline access.
If manually cleaning each application seems tedious, you can use the built-in "Free up space" or "Cleanup" function that is available in shells MIUI, OneUI and others. It automatically finds duplicates, large files and unused applications.
Clear the messenger cache right inside the applications: in Telegram it is “Settings → Data and memory → Memory usage”, in WhatsApp - “Settings → Storage and data”. There you can delete the cache selectively, saving important media.
Managing multimedia and heavy files
Photos and videos are the main consumers of memory on a modern smartphone. High-resolution photos and 4K videos take up a huge amount of space. Regular audit of the gallery allows you to delete unsuccessful duplicates, screenshots and old entries that are no longer valuable.
Use the “Trash” function in the gallery. Often, users delete files but forget to empty the Recycle Bin, where they are stored for another 30 days, continuing to take up space. Also check the folder Downloads (Downloads), where old installation files .apk and documents may be located.
| File type | Approximate size | Recommendation |
|---|---|---|
| Photo (12 MP) | 3–5 MB | Store in the cloud, delete duplicates |
| Video (1 min, 4K) | 300–500 MB | Transfer to PC or external drive |
| Screenshots | 1–3 MB | Delete immediately after use |
| Audio (MP3) | 3–10 MB | Use streaming instead of storage |
Consider using cloud storage services such as Google Photos. The service allows you to enable the “Free up space” function, which deletes pictures already uploaded to the cloud from the device, leaving them available for viewing via the Internet.
Optimization of messengers
Messengers have turned into resource-consuming harvesters. Telegram i WhatsApp by default, save all received media files to internal memory. Without configuration, these applications can quietly “eat up” 20-30 GB in a few months of active correspondence.
In the privacy and data settings of these applications, find the “Media startup” section. Disable saving photos and videos when using mobile networks and Wi-Fi, if possible, or set up automatic deletion of old files. In Telegram you can set an automatic cache limit, for example, 1 GB.
⚠️ Attention: Before global clearing of chats in instant messengers, make sure that you have a backup copy of important correspondence. Deleting the application database inside the storage settings can erase the entire message history.
Also check your messenger folders through the file manager. Often there are files left there from users who have already removed you from their contacts, or videos from channels that you no longer read. Manually sorting folders Telegram/Telegram Video or WhatsApp/Media often gives better results than automatic cleaning.
☑️ Messenger audit
Deleting unused applications and games
Applications that you do not use Used for the last three months, most likely, they will not be needed in the future. Games are especially space-hungry: the application itself can weigh 100 MB, but downloaded data (game cache, textures) can take 2-5 GB.
Go to the list of all applications and sort them by size or date of last use. Ruthlessly remove what you don't use. If the application is rarely needed (for example, a taxi or food delivery), consider replacing the heavy native app with a lightweight PWA version or website.
What is the "Sleep mode" of applications?
In some Android shells (for example, Samsung OneUI) you can put unused applications into sleep mode. They will not work in the background and waste the battery, but will remain installed on the device until you open them again.
Do not forget about the pre-installed software (bloatware). Many manufacturers install their own services and partner applications that the average user will never open. If you do not have superuser rights (Root), such applications can at least be “Disabled” in the settings, which will hide them and stop updates, although they take up space until the first reset.
Using a memory card and cloud services
If the internal memory of the device is physically limited (for example, 32 or 64 GB), the only A radical solution could be to expand the storage. The card slot microSD allows you to transfer photos, videos, music and even some applications there.
When you install a memory card, the system will offer to use it as “Portable storage” or as “Internal memory”. The second option encrypts the card and binds it to the phone, making the files inaccessible on other devices, but allows applications to be installed there. The first option is more convenient for transferring files between devices.
⚠️ Attention: The speed of the memory card is significantly lower than the speed of the built-in flash chip. Installing heavy games or system applications on a cheap microSD card can lead to severe slowdowns and interface freezes.
Cloud technologies are an alternative to a physical card. Services like Google Drive, Yandex Disk or Dropbox allow you to store files on the Internet. This requires a constant connection to the network, but saves the local storage from overflowing. Set up automatic uploading of photos to the cloud and subsequent deletion from the device.
A combined approach (memory card for archives + cloud for important documents + regular cache cleaning) is the most effective way to maintain order in your memory forever.
Radical measures: Reset to factory settings
When none of the The above methods do not help and the phone continues to signal that there is not enough space, the last resort is a complete reset (Factory Reset). This returns the device to a "store-as-stock" state, erasing absolutely all user data, settings and applications.
Before performing this procedure, it is critical to create a full backup. Use your account Google to save contacts, calendar and settings, and copy photos and documents to your computer or to the cloud. Without backup, you will lose all information irrevocably.
The reset process is initiated through the menu Settings → System → Reset settings → Delete all data (reset to factory settings). After rebooting, the phone will be clean. Restore applications selectively so as not to return the memory full problem on the first day.
ℹ️ Note: The menu interface and item names may vary slightly depending on the version of Android and the manufacturer's shell (Xiaomi, Samsung, Realme). If you do not find the item you need, use the search in the settings.
Frequently asked questions (FAQ)
Why is the space not freed up after deleting applications?
You may have only deleted the application shortcut, and not the app itself. Make sure that the deletion is done via Settings → Applications. Also check the folder Downloads and gallery trash - deleted files are often stored there for another 30 days.
Is it possible to delete the Android folder on a memory card or in internal memory?
It is strictly not recommended to delete the entire folder Android entirely. Application data (data) and cache (obb) are stored inside it. Removal will lead to resetting game settings, loss of progress and errors in app operation. Clean only specific subfolders of unnecessary applications.
Is it safe to use cleaning applications (Clean Master and similar)?
Most modern versions of Android have built-in effective cleaning tools. Third-party “cleaners” often consume a lot of resources themselves, show intrusive advertising and can delete necessary files. Built-in tools are usually enough to maintain order.
What to do if the system says “Memory is full”, but the files are not deleted?
Try to restart the device in safe mode to eliminate the influence of third-party applications. If the problem persists, the file system may be damaged. In this case, only a full reset to factory settings with preliminary saving of data will help.
How to transfer applications to a memory card?
This function is not available on all phones. Go to Settings → Applications, select the desired application and check for the presence of the Change or Move to SD cardbutton. If there is no button, the manufacturer has blocked this feature for this application or phone model.