Xiaomi Redmi Note 7 is still one of the most popular budget smartphones, but many owners face the mysterious disappearance of free space. Even after removing photos, videos and apps, memory continues to melt, and the system persistently reports a shortage of space. What is it?
The problem is not only in the obvious “eaters” of space – cache or junk files. MIUI (Xiaomi’s shell actively reserves memory for system needs, and some functions work in the background, quietly “eating” gigabytes. In this article, we will analyze 10 hidden causes of memory overflow on the Redmi Note 7 – from standard cache to little-known “chips» MIUI, We also give step-by-step instructions for vacating the space without losing data.
1.App cache: why it can't be simply deleted
Cash is the first suspect when it comes to memory shortages. On the Redmi Note 7 with 64 GB of internal memory, the cache can take up to 5-8 GB, and the system does not always count it correctly, but just clear the cache through the settings is a half-measure: it will recover quickly, and some applications will start to work slower.
The fact is that the cache is divided into two types:
- 📱 Custom cache – temporary application files (e.g. thumbnails in a gallery or map data in Google Maps) can be safely cleaned.
- 🛠️ System cache – files necessary for fast operation MIUI. Removing them can lead to lags or failures.
To clean the cache correctly, use a combination of methods:
- Go to Settings. → Annexes → App management, select the “heaviest” app (like Facebook or TikTok) and click “Clear Cache».
- For mass cleaning, use the built-in tool: Settings → Memory. → Cleaning (broom badge).
- Reset the section cache /data Recovery mode (only for experienced users!).
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If after cleaning the cache, the application began to slow down, restart the smartphone — MIUI Recover critical files automatically.
2.Jump files: where they hide on Redmi Note 7
MIUI It creates junk files in unexpected places. MIUI/Backup/AllBackup It can weigh a few gigabytes, even though you've never backed up. DCIM/.thumbnails Keeps thumbnails of deleted photos for years.
Where to look for garbage:
- 🗑️ /storage/emulated/0/MIUI — Here are system logs, temporary theme files and backups.
- 📁 /storage/emulated/0/Android/data — cache and application data that are not always visible in a standard file manager.
- 🔍 /storage/emulated/0/Download — Uploaded files that are not needed for a long time, but take up space.
For deep cleaning:
- Install Files by Google or SD Maid – They’ll find trash that’s not available to standard tools.
- Manually check the folders. MIUI and Android via Total Commander or FX File Explorer (requires access to the root directory).
- Use the command adb shell pm clear --user 0 com.miui.cleanmaster to reset the built-in cleaner (if it glitches).
3. Hidden reserves MIUI: Why does the system “take away” memory?
Redmi Note 7 on the MIUI It's going to reserve up to 4 or 6 GB of storage for the system, which is fine. But sometimes it goes up to 10.+ For example, after an update, the system may not vacate space occupied by old firmware files.
How to check reserves:
- Open the Settings. → The phone. → Memory and look at the line "System." If it takes up >8GB - there's a problem.
- Install. AIDA64 and check the section /system. Normally, he should weigh. ~3–4 GB.
If the reserve is inflated:
- 🔄 Restart your phone - sometimes MIUI «Forgetting to release memory after updates.
- 🛠️ Reset the cache in Recovery Mode (Volume Up buttons) + Power when the phone is turned off).
- 📉 If nothing helps, try to revert to the old version. MIUI Mi Flash Tool (Risky!).
What happens if you manually delete system files?
4. Invisible applications: what takes up memory in the background
Even if you have removed all unnecessary programs, hidden services can run on Redmi Note 7:
- 🤖 System applications MIUI (Mi Video, Mi Music, Cleaner – can not be removed without root, but you can turn off them.
- 📡 Google Play Services (Google App) – can cache up to 1-2 GB of data.
- 🔄 Auto-updates — MIUI Google Play can download updates in the background, taking up to 3-5 GB.
How to find and disable invisible “eaters”
- Go to Settings → Applications → Application Management → All applications.
- Sort by size and pay attention to apps marked “System” or “Disabled.”
- Click on an unnecessary app (such as Mi Drop) and select “Disable” (do not “Delete”!).
- For Google services, turn off auto-update on Google Play → Settings → Auto-update of applications.
Disable Auto-Update Applications
Ban background activity for unnecessary applications
Clear the cache of Google Play Services
Disable system applications MIUI (Mi Video, Mi Music, etc.)
Set a limit on background data in traffic settings-->
5 Photos and Videos: Why They Take More Than They Look
Even if you delete all photos from the gallery, they can stay in:
- 🗃️ pup DCIM/.thumbnails — thumbnails of deleted photos.
- 🔄 pup Pictures/Screenshots — Screenshots You Forgot to Delete.
- ☁️ Cloud backups (Google Photos, Mi Cloud) – they are cached on the device.
- 📱 pup MIUI/Camera — There may be temporary camera files here.
How to make room:
- Use Google Files to find duplicates and large files.
- Clean the.thumbnails folder manually (you need a file manager with access to hidden folders).
- Turn off automatic downloads in Google Photos and Mi Cloud.
- Move the photo to a microSD or cloud, and then delete local copies.
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Even after you delete your photos from the gallery, they can still be cached in apps (like Viber or Telegram).
6 System Updates: Why They Are Eating Memory Forever
Every update MIUI It leaves behind tails, old firmware files that the system doesn’t automatically delete. On the Redmi Note 7, it can take up to 2-3 GB after several updates.
How to clean:
- 🔄 Go to Settings. → The phone. → Update the system and click on three dots in the upper right corner → «Remove the downloaded service pack».
- 🛠️ Manually delete the folder. /cache Recovery mode (Wipe Cache Partition).
- 📉 If updates are downloaded automatically, disable this feature in the update settings.
If the memory has decreased dramatically after the update, try to roll back to the previous version. MIUI It's using the Mi Flash Tool, but remember, it'll dump all the data!
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Before upgrading, check the free space – if it is less than 3 GB, the update can hang in the middle and “kill” the system.
7 Viruses and malware: Unexpected memory eaters
Malware applications can not only steal data, but also fill memory with garbage, for example, some Trojans download banner ads or mine cryptocurrency in the background, creating gigabytes of logs.
Signs of infection:
- 🚨 Unknown applications in the list of installed programs.
- 📉 A sharp decrease in memory for no apparent reason.
- 🔋 Fast battery discharge and overheating.
- 📡 Suspicious network activity in the background.
How to check and clean:
- Install Malwarebytes or Dr.Web Light and perform a deep scan.
- Check the list of applications in Settings → Suspicious programmes applications.
- If a virus is found, delete it and clear the memory through Settings → Memory → Cleanup.
- In extreme cases, perform a reset to factory settings.
What if the antivirus doesn’t find the virus, but the memory continues to disappear?
MicroSD and adoptable storage: Why external memory doesn’t help
Many Redmi Note 7 users buy microSD, but the memory is still running out, and the reason is because of the Adoptable Storage feature.
MicroSD problems:
- 🔄 If the card is formatted as a portable storage, applications cannot move to it.
- 🛠️ If the card is formatted as internal memory, it is encrypted and becomes tied to the device (you can not just take out and paste into another phone).
- 📉 Cheap memory cards can “lose” files or run slowly, leading to crashes.
How to use microSD correctly:
- If you only need to store media files (photos, videos, music), format the card as a portable storage.
- If you want to port apps, format as internal memory, but be prepared for the card to become “tied” to the phone.
- Use class cards A2 (For example, SanDisk Extreme for better performance.
- Check the card for errors regularly through Settings → Memory. → Settings (cog icon) → Verification SD-map.
| Type of formatting | Advantages | Deficiencies | Suitable for |
|---|---|---|---|
| Portable storage | Can be retrieved and used on other devices | You can't move apps. | Photos, videos, music, documents |
| Inner memory (Adoptable Storage) | You can transfer applications, expand internal memory | The card is tied to the phone, you can not retrieve without losing data. | Apps, games, cache |
| FAT32/exFAT (externalization) | Compatibility with any device | Cannot be used for applications, file size limit (for FAT32) | Backup copies, file transfer |
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If you use microSD as internal memory, backups regularly – when you reset your phone, the card will be formatted!
FAQ: Frequent questions about memory on Redmi Note 7
🔍 Why is the memory not released after the photo is deleted?
📱 How to transfer applications to SD-card if the "Move" button is inactive?
⚠️ Can I delete the folder? MIUI manually?
🔄 Why after resetting to factory settings memory is not freed?
🛠️ How to increase memory Redmi Note 7 without a memory card?
⚠️ Note: If after all the manipulations, the memory continues to “disappear”, check the smartphone for hardware problems. On the Redmi Note 7, there are cases when, due to wear of flash memory (especially on cheap versions with eMMC 5.1), the system begins to “lose” gigabytes. In this case, only the replacement of the motherboard will help.
⚠️ Please note: Do not use programs such as Clean Master or DU Speed Boosters — they often delete important files and leave behind their own garbage. MIUI or proven utility like SD Maid.