The sudden appearance of the “Your device is low on storage” notification often takes you by surprise when you are trying to take a photo of an important moment or install a critical application update. This problem is one of the most common complaints from users of smartphones based on Android, regardless of the brand or year of manufacture of the gadget. The system blocks the operation of many functions, since in order to perform operations correctly it requires free space for temporary files.
Do not panic and immediately run to the store for a new phone with a large storage capacity. In most cases, the situation can be corrected using standard means or with the help of simple manipulations with the file system. Understanding exactly how operating system allocates space will help you effectively manage resources and avoid reoccurring errors in the future.
Next, we will analyze all the possible causes of storage fullness and offer a step-by-step action plan to free up space. You will learn which files can be deleted without fear, and which files absolutely cannot be touched so as not to disrupt the operation of the smartphone.
Diagnostics: what exactly is taking up space
First of all, you need to understand the filling structure of your drive. Go to Settings → Storage (the path may vary slightly depending on the manufacturer's shell). Here you will see a color chart where applications, images, videos, audio and system files are indicated in different colors.
Often the culprits are messengers that quietly download thousands of photos and videos from chats. Also, a significant share can be occupied by cached data from browsers and streaming services. If you see that the “Other” or “System” section takes up a disproportionate amount of space, this may indicate an accumulation of logs or residual files from uninstalled apps.
⚠️ Attention: Do not try to manually delete files from system folders through the file manager unless you are 100% sure of their purpose. This can lead to the device becoming bricked or an endless reboot.
Pay attention to applications that you have not used for a long time. Sometimes one forgotten game can take up several gigabytes, including downloaded resources. Removing such apps is the fastest way to get free space.
Clearing cache and temporary files
Cache is temporary data that applications save to speed up their work. For example, YouTube stores video previews, and the browser stores copies of visited pages. Over time, this “garbage” grows to gigantic proportions, although it does not carry any useful load for the user.
You can clear the cache selectively for the most “gluttonous” applications. Go to Settings → Applications, select the desired app (for example, Instagram or TikTok) and click Storage. There you will see a button Clear cache. It is important not to confuse this with the “Clear data” button, which will reset the application to factory settings and delete your logins.
For global cleaning, you can use the built-in “Optimization” or “Device Care” tool, which is available in shells One UI, MIUI and others. It automatically finds temporary files and offers to delete them.
- 🗑️ Clear your browser cache regularly Chrome, especially if you actively surf the Internet.
- 📱 Check the cache of social networks, as they load a lot of media content in the background.
- ⚙️ Use the standard file manager to find duplicate downloads.
If the “Clear cache” button is grayed out, try restarting your phone. Sometimes system processes block access to clearing until the next session.
Remember that the cache is restored automatically. Therefore, it is useful to carry out this procedure once a month to keep the system in good shape. This is especially true for budget models with a small amount of built-in memory.
Managing media files and gallery
Photos and videos are the main consumers of space on a modern smartphone. As camera resolutions increase, one minute-long 4K video can weigh hundreds of megabytes. Without regular sorting, the gallery quickly turns into a gigabyte black hole.
Start by deleting bad frames, screenshots and memes that you saved six months ago and will never open again. Pay special attention to the folder Downloads (Downloads), where APK installation files are often downloaded, which are no longer needed after installing the application.
| File type | Approximate weight | Recommendation |
|---|---|---|
| Photo (12 MP) | 3–5 MB | Store in the cloud, delete from phone |
| Video (1080p, 1 min) | 100–150 MB | Transfer to PC or external drive |
| Video (4K, 1 min) | 400–600 MB | Keep only the best moments |
| Screenshots | 1–3 MB | Delete immediately after use |
Use the “Free up space” function in the application Google Photos. It finds photos that have already been uploaded to the cloud and deletes their local copy from the device, leaving access to viewing via the Internet. This allows you to instantly free up several gigabytes.
☑️ Checking media files
Transferring data to a memory card and to the cloud
If your smartphone supports installing memory cards microSD, this can be a lifesaver. You can transfer all your photos, music and even some applications there. In the storage settings there is often an option “Change default save location”, which is worth switching to an SD card.
However, not all applications allow transfer to external storage. Games with heavy caches sometimes become unstable when running from a memory card. In this case, it is better to use the card only for media files and documents.
An alternative is cloud storage. Services like Google Drive, Yandex.Disk or Dropbox provide free space (usually from 5 to 15 GB). Set up automatic uploading of photos so that they do not take up space on your phone, but are available at any time.
⚠️ Attention: When transferring files to a memory card, make sure that it is reliable and not counterfeit. Cheap cards may suddenly fail, and you will lose all your data beyond recovery.
To transfer large amounts of data to your computer, use a USB cable. Connect your phone in File Transfer (MTP) mode and simply drag and drop the DCIM and Movies folders onto your PC hard drive. This is the fastest and most reliable way to free up space.
How to make a memory card an internal memory?
In some versions of Android, you can format a memory card as internal storage. To do this, go to Settings → Storage → SD card → Settings → Format as internal. Attention: after this, the card will be encrypted and will not be able to work in other devices without a reset.
Optimization of messengers
Messengers Telegram, WhatsApp i Viber have a hidden function of automatically saving all received media files to gallery. Over time, the folders with the names of these applications swell to incredible sizes, duplicating the content that is already inside the chats.
Go to the settings of each messenger and disable autosaving to the gallery. Telegram also has a powerful cache management tool: Settings → Data and memory → Memory usage. There you can set up automatic cache cleaning, for example, delete files that have not been opened for more than 3 days.
In WhatsApp you can view the largest chats and delete media files selectively. Often, one active group chat with memes can take up more space than all other applications combined.
- 💬 Disable auto-downloading of media on the mobile network in the messenger settings.
- 🧹 Regularly use the built-in cleaning tools inside Telegram and WhatsApp.
- 🚫 Leave unnecessary groups where heavy videos are constantly sent.
After clearing the messenger cache, the correspondence history will not disappear, text messages will be saved. Only temporarily downloaded pictures and videos are deleted, which, if necessary, can be downloaded again from the messenger cloud.
Setting up automatic cache deletion in Telegram can save up to 2-3 GB of space monthly without any user intervention.
Resetting settings as a last resort
If none of the above methods helped and the system continues to report low space, the file system may have accumulated critical errors or bad sectors. In this case, a full reset to factory settings helps.
This procedure will completely delete all data from the phone, returning it to the “as from the store” state. Before doing this, be sure to back up your contacts, photos and important documents to an external storage device or to the cloud.
Settings → System → Reset settings → Delete all data (reset)After resetting, do not restore all applications from the backup copy at once. Install only the essentials and watch the memory fill up. Often the problem lies in one specific application that does not work correctly after the update.
⚠️ Attention: Before resetting, make sure you remember the password for your Google account. After formatting, the phone will require you to enter a login and password to confirm ownership (FRP protection).
Menu interfaces may differ on different models Samsung, Xiaomi or Realme. If you cannot find the reset option, use the search in settings by entering the request “Reset” or “Factory Reset”.
Frequently asked questions (FAQ)
Why is the space not freed up immediately after deleting files?
In some file managers, deleted files first go to the trash. Go to the Trash (usually in the Gallery or Files app) and empty it completely. Also, the system may take several minutes to recalculate the free space.
Is it possible to delete the Android folder on a memory card?
It is strictly not recommended. In the folder Android/data i Android/obb The cache and resources of installed games and applications are stored. Removing them will cause applications to stop running or be reset to the initial level.
What is a swap file and can it be deleted?
The swap file (swap) is used by the system to expand RAM at the expense of storage space. Removing it can lead to heavy applications crashing and system instability. You shouldn’t touch it without deep knowledge.
Will cleaning applications (Clean Master and analogues) help?
Modern versions of Android are able to perfectly manage memory on their own. Third-party cleaners themselves often consume a lot of resources, display intrusive advertising and, at best, provide a temporary effect. The built-in tools are usually sufficient.
Why does the system write “low memory” even though I deleted everything?
The system logs section or the update cache may be full. Try restarting your device in Safe Mode or resetting your network settings. If the problem persists, the phone's flash memory may be physically worn out.