How to Free Your Memory at Xiaomi Redmi 9C: from cache to transfer applications to SD-map

Owners of Xiaomi Redmi 9C And you're going to have a memory problem, and even with 64 or 128 GB on board, you're going to slow down, you're not only notifying you that you're overflowing, but you're also having hidden files, cache of applications, duplicates and junk data. MIUI In this article, we'll look at 7 working ways to free up space, from basic to advanced, including migrating applications to the next level. SD-map and clean system files without root rights.

The Redmi 9C features a budget MediaTek Helio G35 processor and just 2-3 GB of RAM. When internal storage is packed, the phone starts to hang even when you open messengers. We won’t advise “just delete unnecessary files” – instead, show you how to find and delete what you don’t see in a standard conductor, and how to automate cleaning so that the problem doesn’t come back every week.

1. Analysis of occupied space: what exactly eats memory?

Before you clean, you need to figure out which files take up the most space. Redmi 9C has built-in tools and third-party utilities for this.

Open Settings → Phone → Memory. Here you will see a diagram of the memory distribution by category: Apps, Images, Video, Audio and Other. Click on each category to see the detail. For example, under the Apps section, programs will be sorted by size, often with forgotten games or messengers with gigabytes of cache.

• 📊 System files: MIUI It reserves up to 5 to 8 GB for updates and logs, and you can't delete them without root rights, but you can reduce them.
• 🎮 Games: Even remote games leave files in folders Android/obb and Android/data.
• 📷 Photos and videos: duplicates, screenshots, cache of galleries and thumbnails can take up to 2-3 GB.
• 🗑️ Garbage: temporary files, undeleted updates, bootloader cache.

For a deeper analysis, install Files by Google (free in the Play Market) and it will show:

• 🔍 Unused apps (ones you haven’t used for more than 30 days).
• 📂 Large files (video) >500MB, APK, archive).
• 🗃️ Duplicate photos and documents.

⚠️ Note: Do not manually delete Android folders, MIUI or system, which can cause system failure. To clean them, use only the proven methods in this article.

2. Cleaning up app cache and system debris

Cache is a temporary file that applications create to speed up work, and over time, it grows to gigabytes. On Redmi 9C, the cache can be cleaned in two ways: manually for each application or automatically through the built-in utility.

Method 1: Manual cleaning

1. Go to Settings → Applications → Application Management.
2. Select an app (like YouTube or Facebook) and click Clear Cache.
3. To clean up completely, click “Clear Data”, but note: this will reset the application settings (you will log out of your account).

Method 2: Automatic cleaning

1. Open the Security app (the shield icon).
2. Go to the “Clean” section and click “Check”.
3. The system will show the amount of garbage (usually 1-3 GB) – click “Clean”.

For deep cleaning, use SD Maid (requires root rights for full functionality).

• 🗑️ Residual files of remote applications.
• 📥 Unsuccessful downloads from browsers.
• 📂 Empty folders and duplicates.

💡

If the app is slower after cleaning the cache, restart the phone. MIUI sometimes doesn't free up RAM right away.

3. Transfer applications and files to SD-map

The Redmi 9C supports microSD up to 512GB, but not all apps can be ported to the map.

Step 1: Setup SD-maps as internal storage

1. Insert the memory card into the slot (microSDHC and microSDXC are supported).
2. When a notification appears, select “Use as internal memory”.
3. Follow the instructions of the system (the map will be formatted!).

After that, some applications can be transferred to SD.

Step 2: Transfer of applications

1. Go to Settings → Applications → Application Management.
2. Select an app (such as Telegram) and click on “Storage”.
3. If the “Change” option is active, click it and select it. SD-map.

⚠️ Note: Not all applications support portability, system utilities (Settings, Phone, Messages) cannot be moved, and some programs may run slower after portability.

Step 3: Transfer files

For photos, videos and documents:

1. Open Explorer (or Files by Google)
2. Select files, click “Move” and select the folder on SD-map.

4. Removal of duplicates and unnecessary media files

Screenshots, repetitive photos from instant messengers and cache gallery can take up to 5-10 GB. Here's how to find and delete them:

Method 1: The built-in MIUI Gallery

1. Open the Gallery and click on the three dots in the upper right corner.
2. Select “Management» → «Duplicate».
3. The system will show groups of identical photos - highlight unnecessary and delete.

Method 2: Files app by Google

1. Open the app and go to the “Cleanup” tab.
2. Select “Duplicates” or “Large Files”.
3. Look through the list and remove the unnecessary.

Method 3: Manual search

Open the Explorer and check the folders:

• 📸 DCIM/Screenshots — Screenshots (often duplicated).
• 📥 Download – downloaded files from browsers.
• 🤖 Android/data — cache of games (folders such as com.tencent.ig for PUBG).

5. MIUI Optimization: Disabling Unnecessary Functions

The MIUI on Redmi 9C has a lot of background processes that eat up memory.

1. Disable automatic recording of conversations

If you do not use the call record, turn it off:

1. Go to Settings → Applications → Phone → Record conversations.
2. Turn off the "Automatic Recording" option.

This will free up to 1-2 GB if the records have been accumulating for a long time.

Limitation of background activity

1. Go to Settings → Battery and Performance → Battery Management.
2. Select “Background Limitation” and add apps that don’t have to work in the background (like Facebook or TikTok).

3. Disable MIUI animations

This won’t free up memory, but it will speed up work.

1. Enable Developer Mode (click 7 times on "Version" MIUI» In Settings → The phone).
2. Go to Settings → Additional → For developers.
3. Find the animation scale and set the value 0.5x or turn it off completely.

6. reset partition cache (without data loss)

If standard methods don’t work, try resetting the cache partition.This won’t delete your files, but will clean up the system debris:

1. Turn off the phone.
2. Press the Power button + Volume up until the Mi logo appears.
3. From the Recovery menu, select Wipe & Reset → Wipe Cache (use volume buttons for navigation, power to select).
4. Confirm the action and restart the phone.

⚠️ Note: Do not confuse Wipe Cache with Wipe Data – the second option will reset the phone to factory settings!

After this procedure:

• 🔄 The system will work faster.
• 📉 Free up to 500 MB-1 GB of memory.
• 🔧 Lags will disappear when opening applications.

💡

Resetting partition cache is the most efficient way to clean up system debris without rooting permissions, and do this every 2-3 months to maintain performance.

7. Radical methods: reset to factory settings

If the memory is so full that the phone doesn't update or constantly gives out errors, the last option is hard reset.

• 📱 Make a backup copy through Settings → Additionally. → Backup and reset.
• 🔐 Save passwords (use Google Smart Lock or KeePass).
• 📁 Transfer photos and videos to PC or cloud.

Resetting instructions:

1. Go to Settings → Additional → Backup and Reset → Reset settings.
2. Select “Erase all data” and confirm.
3. After restarting, set your phone as new.

After resetting, the Redmi 9C automatically reserves up to 3-5 GB for system needs, so there will be more free space than before cleaning.

FAQ: Frequent questions about memory release