Expanding memory on smartphones Samsung Galaxy using cards microSD is one of the easiest ways to free up space for photos, videos and applications. However, many users encounter difficulties: the phone does not see the card, does not allow data to be transferred to it, or requires formatting. In this article we will look at all the nuances of connection - from choosing the right memory card to setting it up as an internal or external drive.

Features of working with microSD on Samsung Galaxy depend on the device model and version Android. Modern flagships (for example Galaxy S23 or Galaxy A54) support cards up to 1 TB, while budget models may be limited 512 GB. It is also important to consider that some devices (for example Galaxy S22 Ultra) do not have a slot for memory cards at all - the memory cannot be expanded in them. Before purchasing be sure to check the specifications of your model.

In these instructions you will find:

  • 🔍 How to correctly insert a memory card into Samsung Galaxy (with photo of the slot)
  • 📱 Step-by-step setup of microSD as an internal or external drive
  • ⚠️ Possible errors and ways to eliminate them (the phone does not see the card, asks to format, etc.)
  • 🔄 How to transfer data (photos, videos, applications) to a memory card
  • 🛠️ Tips for optimizing microSD operation to extend its service life
📊 Which Samsung Galaxy model are you using?
Galaxy S-series (S23/S22/S21, etc.)
Galaxy A-series (A54/A34/A14, etc.)
Galaxy M-series
Galaxy Note
Other model

1. Which memory card to choose for Samsung Galaxy

Not all cards microSD work equally well with phones Samsung. Main selection criteria:

  • 📏 Capacity: Minimum recommended volume - 64 GB. To shoot video in 4K or install heavy games (for example, Genshin Impact or Call of Duty Mobile) it is better to take 128 GB and more. Samsung Galaxy S23 Ultra supports up to 1 TB, but for most users enough 256–512 GB.
  • ⚡ Speed ​​class: For video recordings in Full HD suitable Class 10 (10 MB/s), for 4K — UHS-I U3 (30 MB/s). Cards UHS-II (up to 312 MB/s) are redundant for smartphones, but can be useful for professional photography.
  • 🏷️ Brand: Preference should be given to trusted manufacturers: Samsung EVO Plus, SanDisk Ultra, Kingston Canvas. Cheap no-name cards are often counterfeited, and they can fail after a few months.

Important: some models Samsung Galaxy (for example, Galaxy S22/S23) do not have a slot for microSD. In this case, you can expand the memory only using cloud services (Google Drive, Samsung Cloud) or external drives via USB-C.

⚠️ Attention: Memory cards microSDXC (capacity over 32 GB) require formatting in exFAT or NTFS for working with large files. If your Samsung Galaxy does not support these file systems, the card may not be detected.
Samsung Galaxy model Max. microSD capacity UHS-I support Card slot
Galaxy S23 Ultra 1 TB Yes (U3) No
Galaxy A54 5G 1 TB Yes (U1) Yes (hybrid)
Galaxy M33 1 TB Yes (U1) Yes (separate)
Galaxy Z Fold 4 1 TB Yes (U3) No

If you plan to use a memory card to install applications, choose models with high read/write speeds (for example, Samsung EVO Plus U3). Cheap cards can slow down games and apps.

2. Where to insert a memory card into the Samsung Galaxy: location of the slot

In most models Samsung Galaxy the slot for microSD is combined with the tray for SIM card. The exception is some budget models (for example, Galaxy M13), where the slot is located separately. To find it:

  1. Take tray ejector clip (comes with the phone).
  2. Find a small hole on the side of the phone (usually on the top or left edge).
  3. Insert a paper clip into the hole and press lightly - the tray will slide out.

The photo below shows a typical hybrid tray Samsung Galaxy A52 (on the left - nano-SIM, on the right - microSD):

Photo of the memory card slot

On most models Samsung Galaxy the microSD slot is located to the right of the SIM card slot. The card is inserted with the contacts down until it clicks - the tray should slide in smoothly.

Important: in some models (for example, Galaxy S20 FE) the slot for microSD replaces the second slot for SIM cards. This means that you can use either two SIMs or one SIM + memory card.

⚠️ Attention: Not insert the memory card into the tray back to front - this may damage the contacts. The connector must be directed down, and the beveled corner of the card must coincide with the corner of the slot.

☑️ Preparing to install microSD

Done: 0 / 4

3. Formatting a memory card on Samsung Galaxy

After installation microSD the phone may prompt you to format it. if:

  • 🆕 The card is new and has never been used.
  • 🔄 The card was previously used in another device (camera, another phone).
  • ❌ The phone displays the error “Card is damaged” or “Unsupported format.”

Formatting erases all data from the card! If there are important files on it, first copy them to your computer.

How to format a memory card on Samsung Galaxy:

  1. Go to Settings → Device care → Memory.
  2. Click on Memory card (or SD card).
  3. Select Format → Format as internal or Format as portable.
  4. Confirm the action.

What is the difference between formatting modes:

  • 📱 Internal memory: Map becomes part of the system. You can transfer applications to it, but it will be encrypted and will not be readable on other devices.
  • 🗃️ Portable. (external): The card works like a flash drive. It can be removed and connected to other gadgets, but applications cannot be transferred to it.
⚠️ Attention: If you choose formatting as internal memory, the card cannot be removed without losing data. To safely remove it, you will first have to transfer all the files back to the phone and format it again.
💡

If the phone does not prompt you to format the card automatically, check it on another device (for example, on a PC). The card may be damaged or incompatible.

4. Setting up a memory card as an internal or external storage

After formatting, you need to choose how the card will be used. This determines what data can be transferred to it. data-i="183">📱 “Internal memory” mode

📱 “Internal memory” mode

Suitable if you want to:

  • 🎮 Install applications and games on the card.
  • 📸 Save photos and videos by default to microSD.
  • 🔄 Free up the phone's internal memory.

How to set up:

  1. In the notification about a new memory card, select Setup.
  2. Check Use as internal memory.
  3. Confirm formatting (all data will be deleted!).
  4. After completion, click Transfer datato move some of the files to the card.

Limitations:

  • ❌ The card cannot be read on a PC or other phone.
  • ❌ Some applications (for example, WhatsApp or Telegram) may not be transferred.
  • ❌ The speed of applications from the card is lower than from the built-in memory.

🗃️ “Portable storage” mode

Suitable if you want to:

  • 📁 Use the card as a flash drive to transfer files.
  • 🖥️ Connect it to a computer or another phone.
  • 📷 Store backup copies of photos and documents.

How to set up:

  1. In the card notification, select Use as a portable drive.
  2. No formatting is required if the card is already formatted in FAT32 or exFAT.
  3. Done! Now the card is displayed in My file as a separate disk.

Advantages:

  • ✅ The card can be removed and connected to other devices.
  • ✅ No connection to the phone - the data remains always available.
  • ✅ Can be used to store multimedia (photos, music, videos).
💡

If you often switch between devices, select the “Portable storage” mode. To save built-in memory - “Internal memory”, but with caution!

5. How to transfer data to a memory card

After setting up the card, you can transfer files to it. The methods depend on the selected mode.

📱 Transferring files in the “Internal memory” mode

The phone itself will offer to transfer some of the data when you first connect. To do this later:

  1. Go to Settings → Device care → Memory.
  2. Click on Memory card → Move data.
  3. Select files (photos, video, audio) and confirm the transfer.

To transfer applications:

  1. Open Settings → Applications.
  2. Select the desired application → Memory → Change → Memory card.
  3. Not all applications support transfer! System apps and some games (for example PUBG Mobile) remain in the built-in memory.

🗃️ Transferring files in the “Portable storage” mode

In this mode, the card works like a regular flash drive. To copy files:

  1. Open the application My file (or any file manager).
  2. Go to the folder with the files (for example, DCIM for photos).
  3. Select files → Copy or Cut.
  4. Go to the memory card (folder SD card) and paste files.

To automatically save new photos and videos to the card:

  1. Open Camera → Settings (gear).
  2. Find item Save location.
  3. Select Memory card.
⚠️ Attention: Do not remove the memory card while transferring files! This may result in data loss or file system corruption. Always use the function Safe removal in notifications.
💡

To speed up the transfer of large files (for example, 4K videos), connect your phone to a charger. This will prevent the battery from draining during the operation.

6. Possible problems and their solution

Sometimes after connecting a memory card Samsung Galaxy it gives errors. Let's look at the most common ones:

Problem Possible cause Solution
The phone does not see the card Bad contact, incompatible format Reboot the phone, check the installation is correct, format the card
The card is damaged The file system is damaged Format the card via phone or PC
You cannot transfer applications Card in “Portable storage” mode Reformat the card as “Internal memory”
Slow card operation Low speed class (for example, Class 4) Replace the card with a higher one fast (UHS-I U3)

If the memory card is detected, but the files on it do not open:

  • 🔌 Connect the card to the computer and check it for viruses.
  • 🛠️ Use the utility CHKDSK (on Windows) to check errors: 
    chkdsk X: /f

    (where X is the drive letter of the card).

  • 🗑️ If the files are critical, try data recovery apps: Recuva, EaseUS Data Recovery.

Memory cards from unknown manufacturers are often counterfeited: the actual capacity may be several times less than stated. Check the capacity using the app H2testw (Windows) or SD Insight (Android).

7. Tips for optimizing the performance of a memory card

So that microSD lasts longer and works faster:

  • 🔋 Do not remove the card while data is being written (for example, when shooting video or transferring files). This may damage the file system.
  • 📉 Do not fill the card 100%. Leave at least 10–15% free space for stable operation.
  • 🔄 Regularly copy important data to a PC or cloud. Memory cards have a limited recording resource (especially cheap models).
  • 🚫 Do not use the card in extreme conditions (high humidity, higher temperatures +60°C).

To speed up the card in the "Internal" mode memory":

  • 🛠️ Disable application caching on the card (this may slow it down).
  • 📱 Do not install on the card system applications (for example, Google Play Services).
  • 🔍 Check the card for fragmentation using applications like SD Maid.

If you use the card to shoot video in 4K, choose models with support UHS-I U3 or UHS-II. For example, Samsung PRO Endurance or SanDisk Extreme Pro are optimized for long-term video recording.

8. How to safely remove the memory card

Incorrect removal microSD may cause data loss or damage to the card. Always use safely remove:

  1. Open the notification panel.
  2. Find the notification SD card is connected.
  3. Click on it and select Eject.
  4. Wait for the message The card can be safely removed.
  5. Carefully remove the card tray.

If the notification does not appear:

  1. Go to Settings → Device care → Memory.
  2. Click on Memory card → Eject.

In the "Internal Memory" mode, the card cannot be removed without first formatting! First, transfer all the data back to the phone, then:

  1. Go to Settings → Memory.
  2. Select Card memory → Format as portable.
  3. After formatting, the card can be safely removed.
⚠️ Attention: If you remove the card in the “Internal memory” mode without formatting, the phone will no longer see it the next time you connect it. The data on the card will remain, but access to it will be blocked.
💡

Always use safe removal, even if the card is in "Portable Storage" mode. This will prevent damage to the file system.

FAQ: Frequently asked questions about memory cards on Samsung Galaxy

Can a memory card be used as internal memory on all Samsung models? Galaxy?

No, not at all. Some flagship models (for example, Galaxy S22/S23) do not have a slot for microSD. Also, the “Internal Memory” function may be limited on devices with Android 10 and newer due to the policy Google.

Why, after formatting as internal memory, the card is not readable on the PC?

When formatted in the "Internal Memory" mode, Samsung Galaxy encrypts the card. It becomes tied to a specific phone and will not be recognized by other devices. To restore compatibility, format it as a “Portable Storage”.

Is it possible to transfer WhatsApp to a memory card?

Officially WhatsApp does not support transfer to microSD. However, you can manually copy the folder WhatsApp to the card, and then specify a new path in the messenger settings (in the Chat → Backupsection). Please note that this may lead to failures.

How to check the speed of a memory card on a Samsung Galaxy?

Install the application A1 SD Bench from Google Play. It will show the actual read/write speed. For class cards U3 normal values: reading - 80–90 MB/s, writing - 20–40 MB/s.

What to do if the phone says “Card damaged"?

First try formatting the card via your phone. If it doesn't help:

  1. Connect the card to the PC via a card reader.
  2. Run CHKDSK (as described above).
  3. If the data is critical, use recovery apps (Recuva, PhotoRec).

If the card is not restored, replace it.