Owners of smartphones running an operating system Android 9 Pie often face a critical lack of internal space. Modern multimedia applications, games with high-quality graphics and social networks consume gigabytes of memory, which slows down the device and makes it impossible to install new updates. In such situations, expanding storage with a microSD card becomes not just a convenient option, but a necessity for comfortable use of the gadget.
The process of transferring data to Android 9 has its own unique features that distinguish it from older versions of the system. Google has made significant changes to file system management, with an emphasis on security and application isolation, making it more difficult for some apps to directly access external drives. However, proper use of built-in functions or specialized tools allows you to effectively bypass these limitations and free up precious megabytes in the internal partition.
In this article we will analyze in detail all available application migration methods, assess the risks and benefits of each approach. You will learn how to turn an ordinary flash drive into a full-fledged extension of the system memory, what hidden settings exist for advanced users and how to avoid data loss during the optimization process.
Features of memory management in Android 9 Pie
Operating system Android 9 Pie brought with it many security improvements, but at the same time tightened the rules for application access to external storage. In previous versions of the OS, users could easily move APK files to a memory card through the standard menu, but in the ninth version this functionality was hidden or completely removed by device manufacturers. This is done in order to ensure the stability of the system, since the reading speed of memory cards is often inferior to the speed of internal flash memory.
The main mechanism for working with external drives in this version of the OS is technology Adoptable Storage. It allows the system to treat the installed SD card as an integral part of the internal storage, encrypting the data and making it inaccessible to other devices without authorization. Despite the convenience, this method has its limitations: not all smartphone manufacturers include this function in their firmware, preferring to leave the memory card exclusively for multimedia.
⚠️ Attention: Before starting any manipulations with the file system, be sure to create a backup copy of important data. The process of formatting a memory card as internal storage will completely destroy all files located on it.
It is important to understand that transferring system applications and Google services to a memory card can lead to unstable operation of the device. Critical components The operating system must remain on a fast internal drive to ensure correct loading and functioning of the interface. Mostly user apps that do not affect the basic functionality of the smartphone are subject to movement.
Preparing the memory card and device for transfer
The quality and characteristics of the memory card play a decisive role in the performance of the smartphone after transferring applications. To work in internal storage mode or to install heavy games, a high speed of writing and reading data is required. Using cheap class cards Class 4 or Class 6 will lead to noticeable delays when starting apps and possible system freezes, so you need to approach the choice of media responsibly.
Before starting the procedure, you need to make sure that your memory card is not physically damaged and is correctly recognized by the device. It is recommended to format the drive through the smartphone menu, even if it is new, so that the file system is optimized specifically for your phone model. This action will create a clean directory structure necessary for the correct transfer of application data.
☑️ Checking readiness for transfer
It is also worth checking for the latest system updates in the settings menu. Manufacturers often release patches that correct errors in working with external drives or add support for larger memory cards. If your smartphone supports cards up to 256 GB, using a smaller capacity drive may not be practical when installing a large number of heavy applications.
Standard method of transferring through system settings
The most secure and recommended method of moving applications is available through the standard Android settings interface, if the device manufacturer did not block this function. This method allows you to transfer the cache and part of the application data to an external drive, freeing up space on the system partition. The process does not require superuser rights and minimizes the risk of software disruption.
To start the procedure, you need to go to the menu Settings → Applications and notifications → Show all applications. In the list that opens, select the app that you plan to move and click on the item Memory. If the transfer is possible, you will see an active button Change or Use as internal storage, depending on the manufacturer's implementation of the interface.
| Data type | Can be transferred | Remains inside | Impact on speed |
|---|---|---|---|
| APK application file | Partially | Yes (main code) | Minimal |
| Cache and resources | Yes | No | Noticeable at low card speed |
| User data | Yes | No | Average |
| System libraries | No | Yes | Absent |
After selecting the target storage, the system will automatically move the necessary files. It's important to note that not all apps support this feature; developers may not allow their products to be installed on external drives for security or anti-piracy reasons. In this case, the transfer button will be grayed out or missing.
Why some applications cannot be transferred?
App developers can block installation on an SD card to prevent the theft of license data, ensure fast loading of widgets, or avoid errors when working with databases that require high response speeds that are not available on many memory cards.
Using the Adoptable Storage function
Function Adoptable Storage represents the deepest level of integration of the memory card into the Android 9 system. When activated, the SD card is formatted, encrypted and becomes a logical extension of the internal memory, which allows you to install any applications on it, even those that usually do not support transfer. This turns a budget smartphone with a small amount of memory into a full-fledged multimedia device.
Activating this function often requires entering special commands via USB debugging or using a hidden engineering settings menu, since many vendors hide this option. Once turned on, the phone will prompt you to format the card, warning that it will no longer be readable on other devices without a reset. This is the price for data security and a single file system.
⚠️ Attention: After formatting the card in internal storage mode, removing the card without first unmounting it in the settings can lead to data loss and errors in the operation of applications that depend on files on the card.
The advantage of the method is the transparency of the process for the user: the system itself decides where to write a new application based on the available space. However, the speed of the smartphone may decrease if the memory card does not meet high speed standards UHS-I or UHS-II>. In addition, if the card breaks, it will be almost impossible to recover the data due to encryption.
Use memory cards marked "Application Performance Class" (A1 or A2), as they guarantee the minimum random read and write speed required for applications to run.
Transferring data using ADB for advanced users
For devices where standard methods are blocked by the manufacturer, it is possible to force applications to be transferred using tools Android Debug Bridge (ADB). This method requires connecting your smartphone to your computer and having basic knowledge of working with the command line, but it allows you to bypass interface limitations and force a change to the default installation location.
Before you start, you need to activate developer mode by clicking on the build number in the menu several times About phone, and enable USB debugging. After connecting to the PC and installing the drivers, you can use the command adb shell pm set-install-location 2, which will force the installation priority of applications to external storage. To return to factory settings, use the value 0, and to prioritize internal memory - 1.
adb shell pm set-install-location 2It is worth considering that this method is not a panacea and does not work with all applications. Some Android 9 system limitations may ignore this command for critical services. In addition, after rebooting the device, the settings may be reset, and the procedure will have to be repeated again if you do not use additional autorun scripts.
Using ADB gives maximum control over the system, but requires caution: the wrong command can lead to unstable operation of the OS or loss of access to data.
Optimization and management of transferred applications
After successfully transferring applications, it is recommended to audit the installed apps and remove those that are no longer used. Even applications moved to the memory card may leave small configuration files and caches in the internal storage, which take up space over time. Regular cleaning allows you to keep the system in good shape and avoid data fragmentation.
It is also worth paying attention to the settings of specific applications, such as instant messengers and social networks. They often save received media files to internal memory by default, ignoring the transfer of the application itself. In the settings of each such app, you must manually specify the path to save files to the SD card in order to free up maximum space.
Monitoring the status of the memory card is becoming an important part of smartphone maintenance. Periodically check the integrity of the file system and the response speed of the drive. If you notice that applications take longer to load than usual or errors occur when reading data, the card may be reaching the end of its life and should be replaced with a newer, faster model.
⚠️ Attention: Menu interfaces and names of settings items may differ depending on the smartphone model and the manufacturer’s shell (MIUI, EMUI, OneUI). Always check the official user manual for your specific device model.
Frequently asked questions (FAQ)
Is it possible to transfer WhatsApp and all chats to a memory card on Android 9?
Full transfer of the WhatsApp application itself is only possible if the smartphone manufacturer has allowed it in the standard settings or through Adoptable Storage. However, correspondence history and media files can be transferred manually by changing the save path in the settings of the messenger itself or by moving the folder WhatsApp/Media via the file manager.
Why did the application stop starting after the transfer?
This may occur due to the low speed of reading the memory card, which is why the system timeouts waiting for a response from applications. It is also possible that files may be damaged during transfer. Try moving the application back to the internal memory and check its functionality.
Will the speed of the smartphone decrease after transferring games to the SD card?
Yes, most likely, the loading speed of levels and textures in games will decrease, since memory cards, even high-speed ones, are usually inferior in the speed of random access to the internal memory of the smartphone (eMMC or UFS). For heavy 3D games, it is recommended to leave data files in the internal storage.
What will happen to applications if I remove the memory card?
Applications that are completely or partially transferred to the card will stop working. Their icons may disappear from the desktop or an error will appear when clicked. To restore functionality, you will need to insert the same memory card into the same smartphone again.