Blob files on Xiaomi: what it is and can you delete

Owners of Xiaomi, Redmi and Poco smartphones, conducting audits in the storage, often encounter mysterious folders and files whose names say nothing. blob_storage. Users see that they take up gigabytes of free space, and immediately there is a desire to delete them to free up memory.

Blob (Binary Large Object) is a database term meaning “binary large object.” In the context of Android and the MIUI or HyperOS shell, it’s simply a way of storing any data that isn’t plain text. It can be images, videos, app cache, temporary update files, or system logs. Understanding the nature of these files is critical, as deleting them often results in resets or program errors.

In this article, we will discuss in detail why the system creates such files, where they are stored, and whether there are safe ways to manage them. You will learn which ones can be touched and which are critical to running your device. System blob files in the /data/data/ folder cannot be deleted categorically, this will lead to the failure of applications. Let's understand the structure of the file system of your gadget.

Technical nature of Blob objects in Android

Technically, a blob is just a binary. The Linux-based Android operating system uses different storage formats. When an application, whether it's Telegram, Google Chrome or Google Play Services, needs to save a complex file, it often packs it in a blob, which allows the system to not go into details of the content, but simply store the bytes as is.

In Xiaomi smartphones, these files are often found in the context of media and caching. For example, when you view a feed on a social network, images and videos are first uploaded to temporary storage as blob objects. This speeds up the reload of pages. However, if the cache clearing mechanism is not working properly, these files can accumulate, taking up a significant amount of internal memory.

Another important aspect is working with SQLite databases, which are widely used in Android, which often include fields like BLOB to store contact avatars, thumbnails of photos or encrypted authorization tokens, and manually deleting such files through the file manager breaks the logical connections in application databases.

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Use Xiaomi’s built-in Security app to analyze storage – it correctly identifies temporary files that can be deleted without risk.

Where to look for blob files on a Xiaomi device

Searching for these objects requires careful attention, as they can be located in different directories, and most often users find them when connecting a smartphone to a computer or through advanced file managers with root rights.

• 📁 /Android/data/ — cache and data of installed applications, including temporary blob objects.
• 📁 /storage/emulated/0/Android/obb/ — folder for additional game files and heavy applications.
• 📁 /data/data/ — System directory (available only with root rights) where critical databases are located.
• 📁 /cache/ — System-wide cache that is sometimes overflowing with binary files.

There is a common situation in Xiaomi where WhatsApp or Viber create huge blob data sets for storing media files if the privacy settings are automatically downloaded, which can weigh tens of gigabytes.

Also, blob files can be found in system update directories, if you downloaded the MIUI update but didn't install it, or if the installation went wrong, the remnants of the packages can remain as binary objects, which lie deep in the system and are usually not visible to the user without special access rights.

Can I delete blob files: risks and consequences

This is the most important question that you need to answer clearly. The short answer is, you can only delete the user cache, but you can't touch the system databases. cache_blob_123.dat In the browser cache folder, it's safe to delete, the browser will just download the data again, but if the file is deep in the system partitions, the consequences can be unpleasant.

⚠️ Note: Delete blob files from folders /data/data/com.android... Xiaomi system services will lead to loss of settings, reset of authorization in accounts or cyclical reboot of the smartphone.

Let's look at the main risks in more detail: First, the breach of database integrity. Many applications use SQLite, where the blob is part of the record. Deleting the physical file will cause the application to find a broken database the next time it runs, at best it will recreate it from scratch (you lose your correspondence history or settings), at worst, the application will stop running at all.

Second, loss of multimedia data: in MIUI, the gallery and voice recorder can use specific formats for storing previews and drafts; removing the corresponding blob objects will make it impossible to view sketches or restore draft records; the system will not be able to automatically recover this data, since the originals often do not save in the usual JPG or MP3 format.

Memory Analysis: File Type Table

To make it easier for you to navigate, we’ve compiled a table that classifies the types of blob objects you’ll find on Xiaomi, which will help you understand how safe it is to interfere with a particular directory.

As you can see from the table, the security of deletion depends on which process the file belongs to. User data (photos, documents) is not usually called blob, but service information is almost always, so the seven-measure rule works perfectly here.

It’s also worth noting that some viruses and miners can disguise themselves as system blob files. If you see a process that constantly creates new binary files and loads the processor, this is an excuse to check with antivirus. In the Xiaomi ecosystem, the built-in scanner is responsible for this, but it will not be superfluous to check the device with third-party software.

Safe Ways to Clean Storage

Instead of manually deleting files that are fraught with errors, it's better to use the Android and MIUI tools that are standard, they know which files can be deleted without harming the system, and the first and most reliable way is to use the app settings menu.

Go to Settings → Apps → All apps. Find the app that takes up the most space (often social media or browsers). Click on it and select Memory. There you will see the Clear Cache button, which will safely delete temporary blob files without affecting your personal data, logins and passwords.

The second way is to use the Cleanup feature in the Security app, which is pre-installed on all Xiaomi smartphones, and automatically finds garbage, files and large unused files, and the tool's algorithm is smart enough not to touch critical system blob objects.

The third method is manual analysis through a computer: connect your phone over USB, turn on file transfer mode (MTP) and sort files by size. Look for folders with app names you don't use. But even here, delete only the contents of Download, DCIM (if they're not original photos) and Documents folders.

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Regularly cleaning the cache through application settings is more effective and safer than manually deleting files through Explorer.

Problems with updates and blob storage

Often, questions about blob files arise from users trying to update the firmware MIUI or HyperOS. The error when installing the update can be due to overflowing of the partition where temporary installation files are stored. In system logs, this is often displayed as a write error in blob storage.

If the update freezes or gives an error, try to free up space in the system partition. Sometimes it helps to clean the update cache. To do this, go to Settings → About Phone → MIUI version, click on three dots in the corner and select “Delete the update package.” This action will remove the downloaded but not installed firmware file that may have been corrupted.

⚠️ Warning: Do not attempt to interrupt the system file writing process during the update. If the.blob or similar process is active in the task manager during the installation, wait until it is completed.

In some cases, especially on custom firmware or after unlocking the bootloader, the partition structure can be changed, which leads to the fact that the system cannot correctly create a temporary blob file for updating. → Wipe → Wipe Cache).

Optimization of the File System

To avoid the proliferation of junk files in the future, it is worth sticking to several rules of operation of the Xiaomi smartphone. the file system of modern phones (usually F2FS or EXT4) is sensitive to fragmentation, which can cause permanent recording and deleting large blob objects.

It is recommended to do a monthly preventive cleaning, do not allow the memory to be filled up "on the back" When less than 10% of the space is free, the system starts to work slower, and the processes of writing temporary files can end in errors, this often leads to "broken" blob files that can not be deleted in the usual way.

Also, watch for app permissions. If a simple flashlight or calculator requests access to all the files on the device and starts creating its own data folders, it's suspicious. MIUI has a memory protection feature that limits the background activity of applications and prevents them from growing uncontrollably.

Conclusion and final recommendations

Blob files on Xiaomi are an integral part of the Android operating system, they provide fast downloading of content and correct operation of applications, you should not panic at the sight of such files, but you can not ignore their uncontrolled growth either.

The rule is, use the automated cleanup tools provided by the manufacturer. Manual file system intervention is only justified if you have a deep knowledge of the structure of Android. If you are not 100% sure what the file does, you better leave it alone. Smartphone stability is more important than a few megabytes of free space.

Remember that regular updates to applications and the MIUI system itself often contain memory management bug fixes, which reduces the amount of garbage created. Keep an eye on the relevance of the software, and your Xiaomi will run quickly and without failure.