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The review for Realtek USB Card Reader has not been completed yet, but it was tested by an editor here on a PC and a list of features has been compiled; see below. Drivers for Windows 32/Windows 64 This driver provides functionality for the Realtek family of USB card readers.

Install card reader drivers for Samsung 700G7C laptop for Windows 7 x64, or download DriverPack Solution software for automatic driver installation and update.
Card reader is not recognized. Shows up as 'STCII Smart Card Reader' C. Shows up as 'USB Smart Card Reader' (not necessarily a problem) D. Does not read your 'Gemalto TOP DL GX4 144', 'Oberthur ID One 128 v5.5 Dual' CAC. Does not read your CAC when using your Mac. NO TE: We are hearing Mac users having problems with the SCR-331 reader.

Summary :

Does your SD card reader fail to work when you insert an SD card to it? Why does this happen? How to fix this issue? In this post, MiniTool shows you 4 solutions to SD card reader not working.

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SD Card Reader Not Working Windows 10

Windows 10 is quite an excellent Windows operating system and many Windows users have chosen to upgrade their system to Windows 10. However, lots of users reported their SD card reader not working on Windows 10.

Hey, my laptop came with Windows 8, but I bought an SSD and downloaded Windows 10 for it. It has a built-in SD card reader but my SD card won’t show up.tom’sHARDWARE forum

“Why is my SD card reader not working” may be the most concerned question for these new Windows 10 users. The culprits behind this issue are various, but the most possible factors are a poor connection between SD card and SD card reader, missing SD card driver, and SD card infected with virus.

For most computer issues, you can try restarting your computer to see if the issue has been fixed successfully. So, when running into SD card reader not working on Windows 10, you can try restarting your computer first.

Before restarting your computer, disconnect the external card reader if you are using it to read your SD card and then reconnect it after restarting. See if your SD card reader can work well. If not, you can try the following solutions.

Solutions to SD Card Reader Not Working Windows 10

After learning about the possible factors that lead to SD card reader stopped working on laptop, you can try the following solutions one by one when the built-in SD card reader or the external SD card reader is not working.

Check the hardware issues.
Run Windows Hardware and Devices troubleshooter.
Assign a new drive letter to SD card.
Update SD card reader driver.
Clean up virus or malware on SD card.

Fix 1: Check the Hardware Issues

When SD card reader stopped working on Windows 10, you should check the following hardware, including the SD card, SD card reader, the USB cable, etc.

Check the SD card reader

You should make sure that the used SD card reader is compatible with your current operating system (Windows 10). Older readers might be unable to work with the newer operating system.

Apart from the incompatibility between the older reader and the current operating system, the incompatibility between memory card format and the older reader can also lead to SD card reader not working.

Some older memory card reader is unable to recognize the SDHC and SDXC memory card format. Is your SD card reader too old? If yes, you may need to buy a new one and make sure it is compatible with the SDHC or SDXC format or your current operating system (Windows 10).

Check the USB cable

Excluding the above factors, you should check whether the USB cable leads to SD card reader not working if you are using the external SD card reader. To do that, you just need to try to replace the current USB cable with a different one.

Check the SD card

Check whether the gold finger (transmitting signals) on the SD card turns black. If yes, it means that the gold finger has been oxidized and you need to use an eraser to erase the oxide layer.

Then, check if the SD card gets corrupted. If you unplugged SD card while the card was being read, leading to a loss of electrical power to the card, the card may be corrupted. To repair the corrupted, you can read the post Fix Corrupted SD Card with Professional SD Card Repair Tools.

Check the USB port

SD card not working can also be ascribable to the USB port if you are using the external SD card reader. As we know, the external SD card reader needs power through the USB connection when it connects to your computer. However, when the USB port on your computer doesn’t carry enough electrical current to power the reader, the latter will not work.

Therefore, try a different USB port on your computer to see if the SD card reader not working issue could be fixed.

After excluding all the above hardware issues, you can try the following fixes if your SD card reader still does not work.

Fix 2: Run Windows Hardware Devices Troubleshooter

Maybe some potential device issues lead to SD card reader not working on Windows 10. If that is in case, please run the built-in Windows tool – Hardware and Devices troubleshooter. This tool will quickly figure out the device issues.

How to run this tool? Follow the steps below.

Step 1: Insert the SD card into the card reader. Connect the reader to the Windows 10 computer if it is an external SD card reader.

Step 2: Hit the Windows icon and then click the Settings icon from the menu.

Step 3: On the Settings window, click Update & Security.

Step 4: Select Troubleshoot from the left pane of the new window and then find and click Hardware and Devices from the right pane and click the Run the troubleshooter button.

When the tool finishes its work, please see if SD card reader not working has been solved.

Fix 3: Change Drive Letter to SD Card

SD card reader not working can be ascribed to the driver letter confit. For example, the SD card has a drive letter that is D, while the CD/DVD on the computer also uses the same letter.

If the drive letter conflict is the reason for this issue, you can try changing a drive letter to the SD card.

To finish this fix, you can try the Windows built-in tools (Disk Management and Diskaprt) and a third-party program (MiniTool Partition Wizard).

Here I would like to show you how to change drive letter to SD card with MiniTool Partition Wizard. Apart from this function, this program can also help you restore partition on SD card, format 256GB micro SD card to FAT32, and erase an SD card with ease.

If you want to use Disk Management or Diskpart to complete this changing, you can click here.

Step 1: Download the free program by clicking the above downloadable button and then install it and launch it to get its main interface.

Step 2: The SD card will be displayed on Disk Map. Highlight the SD card and then select the Change Drive Letter feature from the left pane. Or right-click the card and select Change Letter.

Step 3: Choose a drive letter that has not been used by other drives from the list. Then, click OK to confirm.

Step 4: Click the Apply button to execute the changes. It will just take a few seconds.

After changing the drive letter to the SD card, check whether the SD card reader still fails to work.

Fix 4: Update SD Card Reader Driver

The fourth reason for “SD card reader stopped working on Windows 10” is that the device driver is outdated, missing or incompatible.

To check whether the device driver is the culprit behind this issue, you can open Device Manager by typing Device Manager in the Cortana’s search bar and selecting the best-matched result.

Samsung Card Reader Driver