“SD card not detected” error is a very prevalent issue on Android smartphones. Except for those cases when there a hardware glitch is behind the problem, a smartphone can’t read an SD card due to some software-related errors. In this article, we’ll present you some straightforward solutions on how to fix a Samsung Galaxy S10 or S10 Plus that is unable to read a mounted SD card.

As we’ve already mentioned above, a smartphone is unable to read a mounted SD card because of several reasons. Most commonly, there are software-related glitches behind SD card errors, but sometimes, the problems with SD cards might be due to faulty hardware or a corrupted SD card.

In this article, we’ll debate all the possible situations so that you can learn everything you have to know about SD card-related errors on Samsung Galaxy S10 or S10 Plus.

Before moving on, you may also like reading the following troubleshooting guides and articles:

  • How to Insert or Remove the SIM Card on Galaxy S10, S10E, and S10 Plus
  • Troubleshoot “No SIM Card” Problem on Galaxy S10, S10E, or S10+
  • How to Fix “SD card not detected” Error on Galaxy S10, S10E or S10+

How to Fix a Samsung Galaxy S10 or S10 Plus That Is Unable to Read a Mounted SD Card

Restart your Samsung Galaxy S10 device

Rebooting an electronic device, be it a smartphone or a computer, refreshes the machine’s memory and processes. Accordingly, a smartphone that is unable to read a mounted SD card might do so because of some minor glitches that a restart would fix. Here’s how to perform a reboot on Galaxy S10 or S10 Plus:

  • Hold Power and Volume Down buttons for about 10 seconds or until the Samsung logo appears on the screen
  • Once the logo pops up, release the keys and allow the device to restart as normal

On some devices, the Maintenance Boot Menu might appear during the process. If that’s the case, select Normal Boot from the before mentioned menu.

Make sure the SD card is not faulty

Before moving on to more challenging methods to fix a Samsung Galaxy S10 or S10 Plus that is unable to read a mounted SD card, make sure that the respective SD card is not faulty. You can do that by removing the card and insert it into another phone to see if it works. In case it functions correctly, then the issue might be with your Galaxy S10 smartphone or a corrupted file on the SD card.

Reformat the external memory

As mentioned above, the issue with your SD card might be due to a corrupted file on the SD card or with your Galaxy S10 smartphone. For the time being, you should reformat the SD card. Here’s how to do it:

  • Go to Settings -> Device Maintenance -> Storage
  • Go to More Options -> Storage Settings
  • Press on SD card option
  • Tap Format
  • Confirm your selection

Reset all settings on Galaxy S10 or S10 Plus

One of the most straightforward solutions to fix several types of glitches that might pop up on Android smartphones is to reset all setting on the respective device. As the name implies, this procedure restores all the settings of the smartphone to their defaults, so, in case you messed up something on your device, this method will fix it.

Here’s how to perform that on Galaxy S10 or Galaxy S10 Plus:

  • Go to Settings -> General Management -> Reset Settings
  • Select Reset Settings and enter your PIN, model, or fingerprint to continue
  • Tap once again on Reset Settings and confirm your selection

When the procedure ends, a dialog box will pop up confirming that all the settings have been reset to their defaults.

Factory reset your Samsung Galaxy S10

This method is erasing everything on your device, including your personal data. Accordingly, before moving on with this solution to fix a Samsung Galaxy S10 or S10 Plus that is unable to read a mounted SD card, you have to back up your files. Now, here’s how to perform a factory reset on Galaxy S10 or S10 Plus:

  • Turn off your smartphone
  • Hold the Volume Up and Bixby buttons for a couple of seconds
  • Now, press and hold the Power key but do not release the first two buttons
  • When the Android logo appears, release all the keys
  • In the Android Recovery Menu, go to “Wipe Cache/Factory Reset” and select Factory Reset
  • Wait until the operation ends

In case none of the before-mentioned methods worked to fix a Samsung Galaxy S10 or S10 Plus that is unable to read a mounted SD card, then the issues might be due to a fault SD card reader. Accordingly, you should contact Samsung Support for further assistance.