Xiaomi and Redmi smartphone owners often face a situation where the device’s internal memory suddenly runs out and the storage analyzer points to the Gallery as the main consumer of resources. This may seem strange, because the photos and videos themselves weigh as much as they should, but the application’s system processes inflate its size to tens of gigabytes. Understanding how the Android file system works in the shell of MIUI or HyperOS is the key to freeing up precious space.
The problem is not media files themselves, but how they are processed, indexed, and stored. Artificial intelligence algorithms used to recognize faces and objects create additional layers of information that accumulate over time. In this article, we will detail the technical reasons for the growth of the application volume and propose proven methods for safe cleaning.
Mechanism of operation of cache and miniatures
The main reason Xiaomi Gallery takes up a disproportionate amount of space is aggressive thumbnail caching. When you open an album with thousands of photos, the system doesn't download the originals in full resolution at once, but creates and saves smaller copies -- thumbnails. These files are necessary for fast scrolling of the tape, but they don't automatically delete even if the original has long been erased.
Over time, the thumbnail database can grow to giant sizes, especially if you often take screenshots, get a lot of images in messengers or install games with heavy graphics, screenshots of which also fall into the general pool. Android system tends to save previews for every image ever seen, creating a duplicate data structure.
- 📂 Accumulation of previews: Each album viewed generates new thumbnail files that take up space.
- 🔄 Lack of auto-cleaning: Built-in mechanisms don’t always effectively remove orphaned thumbnails from deleted photos.
- 💾 Cache size: In some cases, the cache may take up to 40-50% of the total amount of the annex.
⚠️ Warning: Simply removing photos through the basket doesn't always clear the thumbnail cache instantly.Requires a separate procedure to clean the application data or use specialized scripts.
The Impact of Cloud Services and Synchronization
The second important factor is integration with cloud services like Xiaomi Cloud or Google Photos. When synced, the phone can store local copies of high-quality versions of images even if the originals are already uploaded to the cloud, this is done to provide fast access without the Internet, but critically affects the free space.
This is especially true on devices with a small amount of internal memory, where the optimization of storage is not working correctly. Instead of replacing the originals with compressed cloud versions, the system duplicates content. In addition, sync albums often contain hidden system files that are displayed as part of the weight of the Gallery application in the memory usage settings.
Clear Memory mode in cloud settings is often ignored by users, leading to a situation where a full backup of all media is stored on the device. Local cloud data duplication is the most common reason for the sudden disappearance of free gigabytes. Checking sync status can reveal that the phone stores full originals where only links should be.
Hidden synchronization albums
Hidden folders and garbage from messengers
The third aspect of the problem is the automatic saving of media files from third-party applications: messengers like Telegram, WhatsApp and social networks store the received images and videos in public folders, which the standard Xiaomi Gallery scans and indexes, as a result, the weight of the Gallery app indirectly includes the volume of all these files.
Often, users are unaware that DCIM or Pictures folders create separate directories for each app installed. For example, statuses from WhatsApp or temporary files from Telegram can take up gigabytes of space, the gallery perceives them as full-fledged user content and applies all the optimization and indexing processes to them, increasing its own weight in the task manager.
To combat this, you need to regularly audit folders, and the file manager is the best tool to identify such “hidden eaters,” and removing unnecessary folders from remote applications will also help reduce the burden on the media service.
- 📱 Telegram and WhatsApp create separate folders for each chat or channel.
- 📸 Social media: Instagram and TikTok keep drafts and cache in gallery.
- 🗑️ Remote Apps: Folders from long-deleted games or programs often remain dead weight.
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Use the Cleanup feature in the Security app, but before you do that, go to the cleaner settings and select deep cleanup to find files larger than 100MB.
Indexing and EXIF databases
The fourth technical reason is the proliferation of metadata databases. For each photo, the Gallery reads and saves. EXIF-Data (geolocation, camera model, exposure settings) and facial recognition data are used in the background on devices with powerful processors, creating large-scale SQLite databases.
If you have tens of thousands of images in a gallery, the gallery.db database file can be hundreds of megabytes in size, not just a list of files, but a complex structure of links, tags and timestamps. With frequent addition and deletion of files, the database fragments and inflates, taking up more space than is necessary to store relevant information.
Resetting the Gallery app settings often helps to shrink this database to normal size, but be careful: resetting the data can result in the loss of Favorites albums or hidden album settings, so it is recommended to back up important settings before the procedure.
| Type of data | Description | Impact on memory | Cleaning method |
|---|---|---|---|
| Miniatures. | Reduced copies of photos | High (up to 5GB) | Clearing the cache |
| EXIF base | Metadata and tags | Medium (up to 500MB) | Data resetting of the annex |
| Cloud cache | Local copies of the cloud | Critical (up to 10GB) | Shutting down synchronization |
| Basket | Recently deleted files | Depends on the user. | Cleaning the basket |
Practical steps to vacate the site
Now, to the specifics. The first step is to manually clean the cart. Many users forget that deleted photos stay in the Gallery basket for 30 days, continuing to occupy space. Go to the albums, scroll down to "Deleted" and click "Clean".
The second step is to clear the cache through the system settings. Go to Settings → Apps → All apps → Gallery → Memory. Here you need to click the "Clear Cache" button. Don't confuse it with the "Clear All" button, which will reset the application settings. If the problem persists, you can try to clean the data, but be aware of the risk of losing albums.
☑️ Checklist for quick cleaning
The third step is to use a built-in analyzer, and the Security app has a Cleanup tool that finds similar photos, blurry images and screenshots, and removing that visual noise will make it much easier for the Gallery indexer to do that.
⚠️ Warning: When cleaning the application data, the Gallery may temporarily disappear the display of the albums. Don't panic, after rebooting and re-scanning the library (may take time), all photos will return to their places.
Prevention and optimization of the system
To keep the Gallery’s bloat problem from coming back, you need to adopt a routine prevention habit: Use cloud services wisely: set up automatic deletion of local copies after uploading to the cloud, if such a feature is available on the service you use, or manually delete large videos after they are transferred to your PC.
It is also recommended to disable auto-save media from instant messengers. In the Telegram and WhatsApp settings, you can prevent the saved photos to the phone gallery. They will be available inside the applications, but will not clog the general media library and inflate the weight of the system Gallery.
Regularly restarting the smartphone also helps the system to self-maintain file systems and delete temporary files that may have "hanged."The Android file system fragments over time, and restarting helps defragment the logical structure of data storage.
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Regular cleaning of the cart and disabling auto-save from instant messengers prevent 80% of memory overflow problems with the Gallery.