Owners of budget smartphones often face a lack of built-in storage, especially in the Xiaomi Redmi 6A model, where the base memory is only 16 or 32 GB. After installing the MIUI operating system and the basic set of programs, the user is left with critically little space, which leads to constant notifications of a lack of space.
Xiaomi’s shell storage extension has its own unique features, different from standard Android. The system strictly controls access to the file system, so simply inserting a flash card is not enough – you need to properly set recording priorities and, where possible, forcefully transfer the application cache. It is important to understand that not all programs support external media for security and performance reasons.
In this guide, we’ll take a look at all the memory optimization techniques available, from standard system settings to more advanced methods through the engineering menu, learn how to make a memory card the default storage and what limitations Android 8.1 Oreo, which is the Redmi 6A firmware, imposes.
Preparation of memory card and smartphone for work
Before you start transferring data, you need to make sure that the external drive is compatible and serviceable. Xiaomi Redmi 6A supports microSD cards up to 256 GB, however, for stable application operation, it is recommended to use speed cards of at least Class 10 or UHS-I. Slow drives can cause delays when starting programs and slowing the interface.
Insert the card into the slot, which in this model is combined with the tray for the second SIM-Use a paper clip from the kit to remove the tray. Pay attention to the correct orientation of the contacts: the golden pads should look down, and the bevelled corner of the map should match the shape of the tray. After turning on the smartphone, the system will automatically suggest configuring a new storage.
⚠️ Warning: If there is important data on the memory card, copy it to the computer in advance. The formatting process as an internal storage will completely destroy all information on the media.
MIUI will offer two uses: as a portable storage device or as internal memory. For our purposes, which is to install applications, we need to choose the second option if it is available, or set the priority of writing manually, and formatting will create a secure partition that is only accessible to this smartphone.
☑️ Pre-testing
Basic Memory Configuration in MIUI
Once installed, the map appears as an extra volume. To manage it, go to the Settings menu, then select About Phone and click on Warehouse. Here you can see detailed statistics on how much space apps, pictures, videos and system files take up. Redmi 6A owners should pay attention to the Other section, which is often inflated by the messenger cache.
You can find a "Clean" button in the same menu that will trigger the built-in optimization tool, but to migrate applications, we need a deeper setting. SD-If the system allows, it will be a button called "Format" or "Use as internal storage".
Unfortunately, in some versions of the firmware for Redmi 6A, the memory pooling function is hidden by the developers, in which case the card only works as a file archive. Android's regular mechanism allows you to transfer only a part of the application data, leaving the executable file in internal memory, which means that 16 GB of internal memory will still fill up, but somewhat slower.
| Type of memory | Reading speed | Recording speed | Appointment |
|---|---|---|---|
| Built-in (eMMC) | Tall. | Medium | System and applications |
| SD Class 4 | Low. | Low. | Photos and music |
| SD Class 10 / UHS | Medium | Medium | Apps and cache |
| SD UHS-II / III | Very high. | Tall. | 4K video and heavy games |
If the standard means of transferring the program fails, the system will give a message that it is impossible to move, a restriction due to the fact that application developers prohibit the removal of their products to external media, in which case third-party utilities or changes in the developer's settings help.
Transfer of applications by standard means
To try to migrate a particular program, open Settings, scroll down to App, and select All Apps. In the list that opens, find the desired application, such as a heavy game or social network. Click on the title to open the management page.
In the app menu, find the Memory or Storage button. If the program supports portability, the Change or Move button will be active here. SD-You click on it, you start the migration process, and the duration of the operation depends on the size of the application and the speed of your flash card.
Once the process is complete, the button will change its state to Move to internal memory, which confirms the successful transfer. 6A This button is often missing or inactive for most system and popular applications.The restriction is due to Google's security policy and optimization. MIUI.
⚠️ Note: Do not remove the memory card while the applications ported to it are running, this may lead to data loss or incorrect program launch.
It is worth noting that even with a successful transfer, some data (especially widgets and some services) will still remain in internal storage. Completely free the built-in memory module will not work, but it is quite possible to win 1-2 GB of free space.
Why is the transfer button grey?
Using a Developer Mode for Forced Transfer
There is a hidden setting in Android that makes the system consider the external card a priority for installing new programs. To activate the developer mode, go to Settings -> About phone and quickly click 7 times on the MIUI version.
Now go back to the main settings menu, select Additional, and find Developer For, in the long list of options, go down to Applications, find the Force allow apps on external. Activate it.
Once this function is enabled, you need to restart the smartphone. Now, when installing new applications, the system will default to offer a memory card as the installation location, if the program technically supports this format of operation. Forced mode can work unstable with some types of software.
- 📱 Open the menu of hidden developer settings.
- 📂 Activate the external preservation permit.
- 🔄 Restart the device to apply changes.
- 📥 Install new applications – they will stand on SD.
Keep in mind that this setting won't automatically transfer applications that are already installed, you'll have to delete them and reinstall them, or use the move button, which can now be active for more programs. Be careful: system applications are best left unaffected.
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If after the activation of the developer mode, the smartphone started to work slower, try to turn off this feature. Forced transfer to a slow memory card can greatly reduce the overall performance of the system.
Working with files and multimedia
Even if you are moving the apps themselves (APK-- limited, you can significantly reduce memory by carrying the heavy data generated by these applications. The camera, voice recorder, browser and instant messengers by default save files to internal memory.
For example, in the Camera app, click on the menu (three bars or a gear) and select Settings. Find Save in and specify your SD-Now all photos and videos will be recorded directly to the external media, bypassing the built-in storage.
In Chrome or MI Browser, you can also specify a download path. Go to your browser settings, find the Downloads section and change the path to the folder on the memory card. Files received via WhatsApp or Telegram are also on the inside by default, but they can be moved manually through the file manager.
Use a standard conductor, Explorer. Go to internal memory, find folders. DCIM, Download, MIUI. Select unnecessary large files and move them to SD-When moving files through the Explorer, they physically change their location, freeing up space in the system partition.
⚠️ Note: When manually moving folders with application data (for example, cache games from the folder) Android/obb) You can stop running the program. Move only user files: photos, videos, documents.
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Transferring media files (photos, videos, music) to a memory card frees up the built-in storage more effectively than trying to transfer the applications themselves.
Frequent problems and ways to solve them
Redmi 6A users often experience a situation where the application stops working or the phone starts to slow down after transfer, due to the difference in memory access speeds. The built-in eMMC module is faster than most microSD cards. If the system tries to read data from a slow card, there are delays.
Another common problem is that the application icons disappear after extraction and repainting, which happens if the card is not unmounted software before being removed, and the system loses its way to shortcuts, and they have to be restored manually or with a launcher widget.
If the memory card is defined as “damaged” or “not supported”, try formatting it on your computer in the file system. FAT32 (For cards up to 32GB or exFAT (64GB) then insert the card back into your phone and format it with the means. MIUI.
- 🐌 The app is slow – replace the card with a faster one (Class) 10/U3).
- ❌ Formatting error – check the card for errors via PC.
- 📉 Quickly sits down the battery - background indexing of files on SD-Consume Energy Card.
- 🔒 Files are not readable – check access rights in privacy settings.
In some cases, cleaning the Media Storage cache helps, so go to the application settings, turn on the system processes, find Media Service, and click Clear, and then the phone will index the files on the map again.