Modern smartphones, even flagship models, often face a lack of built-in space due to the growing size of high-resolution photos and voluminous videos.
Memory cards of format microSD from the company Samsung remain one of the most reliable and affordable ways to expand storage for devices based on Android.
However, simply inserting a drive is not enough - you need to properly configure the system and move files to free up precious gigabytes of internal memory without losing access to data.
Preparing a memory card and smartphone
Before starting the procedure, make sure that your memory card Samsung EVO or PRO is working and has sufficient capacity for the planned data.
Insert the drive into a special slot on your smartphone using a paperclip or tray included with the device.
After physical connection, the system usually sends a notification that new media has been detected.
You will need to select the drive mode in the settings, since Android offers two main options for using external memory.
⚠️ Attention: If the memory card was previously used in another device (camera, another phone), the system may prompt you to format it. This will delete all old data, so first copy important information to your computer.
The choice between the "Portable storage" and "Internal memory" modes determines the further logic of working with files.
In portable storage mode, the card works like a flash drive, where you can drop media files manually or automatically.
Internal memory mode (Adoptable Storage) encrypts the card and makes it part of the system, but this option is not supported by all smartphone manufacturers.
For maximum 4K video recording speed, choose U3 or V30 class memory cards from Samsung, as they guarantee a stable data stream without delays.
Setting up a memory card as the main storage
If your smartphone supports the memory pooling function, you can make a card Samsung continuation of the internal storage.
To do this, go to the section Settings → Device maintenance → Storage and select the detected card.
Click on the menu button (three dots) and select item Storage settings, then specify the "Use as internal storage" option.
The system will warn you that the card will be formatted and encrypted, after which the preparation process will begin.
| Option | Portable storage | Internal memory |
|---|---|---|
| Encryption | No | Yes (binding to device) |
| Transfer to another phone | No restrictions | Only after formatting |
| Application installation | Limited | Full support |
| Working speed | Depends on the card class | Requires a high speed card |
After completing the setup, the system may offer to automatically transfer existing data from the old drive to the new one.
Agree with the transfer if you want to instantly free up space, but this process may take a long time depending on the size of the files.
Why do some phones not see this option?
Many manufacturers (for example, Samsung in the latest models or Huawei) have programmatically disabled the ability to use the card as internal memory in order to encourage the purchase of models with large built-in capacity or the use of their own cloud services.
Manually transferring photos and videos through a file manager
The most common scenario is manually moving media files, which take up the lion's share of any user's memory.
Open the standard application My files or any third-party file manager installed on your device.
Go to the section Internal memory → DCIM → Camerawhere pictures and videos are saved by default.
Select the desired files with a long press or select the "Select all" option in the control menu.
- 📁 Click the "Move" or "Copy" button in the bottom file control panel.
- 💾 Select the target directory on the memory card, for example
SD card → Pictures. - ✅ Confirm the operation and wait for the progress bar to complete.
It is important to distinguish between the “Copy” and “Move” functions: copying will create a duplicate file, taking up space twice, and moving will delete the original from the internal memory.
For large video files, it is recommended to use moving to avoid confusion and duplication content.
Also do not forget to check the folder Downloads (Downloads), where documents and installation files are often accumulated.
☑️ Controlling the transfer of media files
Transferring installed applications to the Samsung card
Moving the applications themselves to a memory card is a more complex task and depends on the policy of the developer of a particular software.
Go to the smartphone settings via the path Settings → Applications and select the app you are interested in.
In the application menu, find the section Storage. If the developer has allowed the transfer, the "Change" button will be active there.
Click on it and select the memory card SD as the new storage location.
⚠️ Attention: System applications and critical services (messengers, banking applications) are often impossible to transfer to external media for reasons of security and stability.
Even if the application is partially moved, part of its data (cache, settings) will still remain in the internal memory of the device.
This is normal for the architecture Android, since the internal memory works faster and ensures instant launch of critical components.
Some older applications may be unstable when launched from a memory card, especially if the card has a low read speed.
Moving applications saves space, but does not guarantee complete freeing of internal memory, since cache data often remains on the main drive.
If the change storage button is inactive (gray), it means that the application developer has prohibited its installation on external media.
In such cases, only deleting unnecessary apps or clearing their cache manually helps.
Automatically setting up the saving of new data
In order to avoid manual transfer in the future, it is advisable to set up automatic saving of new files directly to the card Samsung.
Open the application Camera and go to its settings through the icon gears.
Find item Save location or Storage and switch the toggle switch to "Memory card".
Now all new pictures and videos will be recorded directly to an external drive, bypassing the internal memory.
A similar procedure can be done for a voice recorder, some video editors and instant messengers (for example, in Telegram or WhatsApp in the data storage settings).
For the browser Chrome or other browsers, file downloads can also be redirected to the download settings.
This turns the memory card into the main buffer for incoming information, keeping the fast internal drive free for system operation.
⚠️ Attention: The writing speed to the memory card may be lower than to the internal memory. When shooting video in high resolution (4K 60fps), there may be delays or interruptions in recording if the card does not meet the required speed class.
Regularly check the status of the memory card in the storage settings to ensure that it is detected by the system correctly.
In case of recording errors, the system usually notifies the user about the need to remove or reformat media.
Possible problems and their solutions
Sometimes users are faced with a situation where the phone sees the card, but does not allow you to write files to it or transfer applications.
A frequent reason is the file system: old cards can be formatted in FAT32which limits the size one file 4 GB.
Modern cards Samsung usually use exFAT, which allows you to store files of any size, but requires support from the OS.
If the card is defined as "Blank" or "Unsupported", try formatting it using a smartphone rather than a computer.
- 🔄 Try removing the card, wipe the contacts with a soft eraser and insert it back until it clicks.
- 📵 Make sure that the phone is completely turned off before removing the card to avoid damage to the file system.
- 🛠 Check for smartphone firmware updates, as new versions of Android often correct errors in working with external drives.
In rare cases, the problem lies in the card reading slot itself, which could become clogged with dust or oxidized.
Using non-original adapters or cards of dubious origin can also lead to unstable operation and data loss.
What to do if the card is not readable on the PC?
If the smartphone sees the card, but the computer does not, the card may be formatted in a specific file system or has a hidden partition. Try using the SD Memory Card Formatter utility from the SD Association to completely reset the partition structure.
Is it possible to transfer WhatsApp to a Samsung memory card?
A complete transfer of the WhatsApp application itself is impossible without root access, since the messenger stores databases in the internal memory for security. However, in the settings of WhatsApp itself (Settings → Chats → Chat backup), you can change the location where backups and media files are saved to the memory card, if such an option is available in your version.
Will photos be lost when formatting the card?
Yes, formatting completely clears the memory card, deleting all files, folders and directory structure. Before performing this operation, be sure to copy all valuable data from the card to your computer or cloud storage.
Which memory card is best for Samsung Galaxy?
For modern Samsung smartphones, the optimal choice is series cards Samsung EVO Plus or PRO Plus with speed class U3. They provide high read and write speeds necessary for working with applications and recording high-definition video.
Why do they run slower after transferring applications?
The speed of applications depends on the reading speed of the memory card. If you use a cheap card with a low speed class (Class 4 or Class 6), data will take longer to load than from a fast internal drive, which causes “lags” and long startup times.