How to transfer applications to the memory card Xiaomi Redmi 9

Owners of the popular budget smartphone Xiaomi Redmi 9 often face a lack of built-in storage, especially in the base version of 32 or 64 gigabytes. MIUI system, although optimized for low-end hardware, still takes up a significant amount of space, leaving the user with limited space to install games and media. When memory is full, the device starts to work slower, and new programs simply stop downloading from the store.

Fortunately, the Redmi 9 features a microSD card slot that allows you to significantly expand the capabilities of the gadget. However, unlike older versions of Android, modern shells do not give a simple “Move to SD” button for all applications at once due to security and stability limitations of the system.

In this guide, we will look at proven ways to transfer data that will help free up precious gigabytes of internal memory. We will look at both the standard system tools and more advanced methods that require attention. Full portability of system applications without root rights to MIUI 12 and above is technically impossible by standard means, so the focus will shift to user data and cache.

Preparation of memory card and file system

Before trying to transfer files, you need to properly prepare the drive. Store-bought card may have a file system FAT32, which does not always work correctly with modern applications that require storing large amounts of data. Android system based on MIUI prefers the exFAT format or internal encryption format for working with programs.

Put the card in the slot next to the SIM cards and wait for the notification. If you plan to store only photos and music, you can leave the standard formatting. But for installing applications, you better use the "Expand Memory" feature, which will turn the card into part of the system partition.

• 📱 Go to Settings. → The phone. → Storage and select your card.
• 💾 Click the Format button and select the “Use as internal storage” option (if available).
• ⚙️ Wait until the process is over, during which the system will create an encrypted partition.
• 🔄 Once completed, the smartphone may suggest a reboot to apply the changes.

⚠️ Note: Formatting a card as an internal storage will completely remove all data from it. Be sure to back up important files to your computer before starting the procedure.

Not all memory cards are suitable for active work with applications, but cheap Class 4 or Class 6 models can cause strong interface lags, as they have a much lower reading speed than the built-in memory of the phone.

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Use UHS-I speed memory cards (U1 or U3) from proven brands like Samsung or SanDisk to minimize the risk of data loss and ensure smooth operation of heavy gaming.

Using a Developer Mode for Forced Transfer

One of the most effective ways to get the system to allow the transfer of applications is to activate the hidden menu of the developer. In the standard interface Xiaomi Redmi 9 this option is hidden so that inexperienced users do not accidentally disrupt the system. Activation of this mode adds to the settings item that allows you to forcibly move the installed programs.

To start, you need to click on the build number several times in the phone menu, which will unlock access to the advanced settings. Be careful: changing the settings in this section can affect the stability of some functions, so only change what is necessary for your purpose.

After activating the menu, go to the Additional section → For developers, find a clause that might be called "Allow applications to be saved to external media," or something similar. Turning on this switch doesn't guarantee that all programs are ported, but it does signal to the system that using this switch is a good way to do it. SD-card-priority.

It is important to understand that even with the option enabled, many modern apps, such as WhatsApp, Telegram or bank customers, can ignore this setting due to security requirements.

Configure data storage in popular applications

Even if the app itself remains hanging in internal memory, its “heavy” content — photos, videos, voice messages and cache — can often be redirected to a map. This frees up the bulk of the storage, which often ends first. In Xiaomi Redmi 9, this is done through the settings of specific programs.

Consider the popular messengers. WhatsApp is based on Settings. → chat → Backup chats where you can choose to save on Google Drive, but for local file storage you need to change the settings in the “Data Storage” menu (if the version allows) or use the file manager to transfer the folder WhatsApp/Media.

• 📸 Camera: Open the Camera app, press three menu bars → Settings → Save it on. SD-map.
• 🎵 Music and Video: In the Standard Player MIUI Music or Video in the settings specify the path to the external drive.
• 🗺 Navigation: In Google Maps or Yandex.Navigator in the settings of offline maps, select storage on the SD-map.
• 📷 Instagram: Saves stories and posts to a gallery that can be reconfigured via system paths (requires file managers).

⚠️ Note: When you manually transfer folders of data through the file manager, make sure that access rights allow the application to read new paths. On Android 10 and above, access to the file system is restricted.

For Chrome or other downloaders, there is often an option in the File Save Path settings. Change it from /storage/emulated/0/Download to your card path, such as /storage/sdcard1/Download. This will automatically save all downloaded documents immediately to an external medium.

Application of third-party file managers and utilities

The MIUI regular conductor has basic functionality, but for deep work with the file system, it is better to use specialized software. Programs like Files by Google, ES Explorer (old versions) or Total Commander allow you to see the folder structure in more detail and perform mass movement.

App2SD, which analyzes installed programs and shows which programs can be moved and which are blocked by the system, also has a Link2SD feature that requires root rights, but in normal mode helps to clear the cache and move apk files.

The process of working with these managers is usually this: you pick up a three-dimensional folder in the internal storage, copy it to the map, and then delete the original, and some managers are able to create symbolic links, tricking the system into thinking that the files are in the phone, even though they are physically on the map.

Use of third-party software requires caution: Do not delete files whose purpose you do not know, especially in the Android/data and Android/obb system folders. Deleting the game cache may lead to the need to download gigabytes of data again.

Hand-over of games and heavy data cache

The most effective way to free up space without losing functionality is to manually transfer the game's cache, and many users don't know that once installed, the game downloads additional files that are separate from the application itself, which often takes up 2-5 GB of storage.

Using a file manager with access to root folders (such as ZArchiver or MT Manager), follow the path Internal Memory → Android → obb. Here you will see folders with names like com.rockstar.gta3. Copy the heavy folder to the memory card, and then delete it from internal memory.

But moving files is not enough. To get a game to see them in a new place, you might need to create a symbolic link, which is impossible without superuser rights. Without Root rights, you can just store game archives on a map, unpacking them only when you need to play, but that's inconvenient.

A simpler option for Xiaomi Redmi 9 is to change the save path in the settings of the game itself, if the developer is able to. PUBG Mobile or Call of Duty Mobile resources can be downloaded immediately SD-map at the first start, selecting the appropriate item in the bootloader window.

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Without Root rights, you can’t make the system think that the folder is on the right side. SD-The card is in internal memory. You can only move the files and store them there, but the application may not see them in a new way.

Typical errors and problems with transfer

In the process of optimizing storage, users often encounter errors, the most common being “File corrupted” or “Application not installed,” which often happens if the memory card was retrieved while writing data or if a poor-quality adapter was used.

Another problem is the widgets disappearing or the applications that are displaced fail. SD-the card is below the speed of the internal memory of the eMMC or UFS, systems can "lose" an application if it tries to boot faster than the card can respond, in which case the widget disappears from the desktop.

• ❌ Formatting error: Occurs when using cards larger than 128 GB on older file systems.Solution: format in exFAT.
• ❌ Update failure: If the app is updated, it can be written back to internal memory, ignoring previous settings.
• ❌ Data loss: Sudden card extraction leads to corrupted database in messenger databases.

⚠️ Warning: Never remove a memory card while the phone is on, without first turning off the Settings menu → Warehouse → Extract SD-This can cause the file table to be lost.

If the phone is unstable after the transfer, try to return all the files back. Sometimes the problem is not the memory capacity, but the conflict of drivers or broken sectors on the card itself. Check the health of the drive using the SD Insight utility.

Frequently Asked Questions (FAQ)