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My laptop reads my USB and then it disappears

Daniela 20 Reputation points
2026-04-17T01:35:04.4533333+00:00

I recently bought an USB type-C card reader from Amazon (Hicober) to read the SD card I have in my digital camera. I connected the reader to my laptop and connected the SD card, but when I try to open the file, it disappears. It only stays visible for seconds and then it's nowhere to be found. I tried connecting the reader to my phone since I have an Android and it works in a certain way (it still doesn't let me see the pictures or anything) but it still reads the device and shows that there is something in it I just can't open it. In my laptop I tried everything, updating the drive and turning off settings like "turning off an USB device if consumes a lot of battery" and all that stuff but it says that there is no problem with it. What do I do know? 🥲

Windows for home | Other | Devices and drivers
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  1. Sin-D 9,845 Reputation points Microsoft External Staff Moderator
    2026-04-18T02:30:49.9833333+00:00

    Hi Daniela,

    I understand how frustrating this can be, especially when the SD card appears briefly and then disappears when you try to open it. Have you already tried the Q&A Assist suggestions? In addition, please try the following.

    Before going further, just to confirm:

    • Are you signed in to Windows using a personal Microsoft account (for example, Outlook.com / Hotmail), not a work or school account?

    In the meantime, please try the following:

    Step 1: Check Disk Management behavior

    Since the device appears and disappears, we need to see whether Windows detects the SD card as a disk but fails to mount it.

    1. Press Windows + R, type “diskmgmt.msc”, then press Enter
    2. Keep Disk Management open
    3. Insert the SD card and watch carefully:
      • Does the disk appear briefly and then disappear?
      • Does it show as “No Media”, “Unallocated”, or without a drive letter?

    Please describe exactly what you see.

    Step 2: Manually assign a drive letter (if it stays visible)

    If the SD card remains visible in Disk Management but has no drive letter, try this:

    1. Right‑click the SD card volume
    2. Select “Change Drive Letter and Paths”
    3. Click “Add”, choose a letter, then OK

    Step 3: Rule out USB‑C power / compatibility issues

    USB‑C card readers (especially third‑party ones) can disconnect if the port cannot provide stable power.

    Try this quick test:

    • Plug the card reader into a different USB‑C port (if available)
    • Avoid hubs or adapters
    • If your laptop supports USB‑A, test with a USB‑A adapter

    If the issue does not occur on another computer, this points to a local USB controller or power‑management issue on the laptop.

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".    

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  1. Sumit D - IA 168K Reputation points Independent Advisor
    2026-04-17T02:30:12.18+00:00

    Hi Daniela,

    It sounds like a hardware problem, to be fair.

    To better understand the state,

    Post a Screenshot of disk management.

    Open Disk Management by typing in diskmgmt.msc in Run Dialog box.

    To attach a screenshot, see below:

     

    • Press Windows key + Shift + S together on the keyboard. The screen will dim with overlay. Drag the pointer to take a screenshot.
    • The screenshot will be copied to the clipboard. Please press Ctrl+V in the editor to paste it, then confirm to attach the image.

     

    Alternatively, you can press the PrtScn key on the keyboard, if it exists, to directly copy the Entire screen, which you can paste using CTRL+V.

     

    I’m eager to hear back and work together to find a solution.

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  2. Q&A Assist
    2026-04-17T01:35:16.07+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    On Windows 8.1/Windows Server 2012 R2 there is a known issue where SD cards connected through a USB card reader are not detected reliably, especially after sleep or when the reader has been idle. The SD card may appear briefly and then disappear, or not be recognized at all.

    This happens because the disk driver does not send the required test command to the card reader controller after the system resumes or when checking for media changes, so Windows cannot correctly detect the SD card’s presence or status.

    For affected systems (Windows 8.1/Windows RT 8.1/Windows Server 2012 R2), Microsoft provides a hotfix that updates the storage class driver (Classpnp.sys) to correct this behavior. Installing the hotfix that applies to the specific OS version resolves the problem where SD card insertion is not detected or the card disappears from File Explorer.

    If the SD card reader has hardware ID VID_0BDA&PID_0307, there is also an update rollup (KB 2995388) that fixes an issue where the SD card is not recognized immediately after waking from sleep or after the reader has been idle for a long time.

    Summary of actions on affected systems:

    1. Confirm the OS is Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2.
    2. Install the hotfix for “USB SD card reader loses capability to detect media change in Windows” that updates Classpnp.sys.
    3. If the reader’s hardware ID is VID_0BDA&PID_0307, install update rollup 2995388 for additional SD card recognition fixes.

    These updates correct the driver behavior so that SD card insertions and media changes are detected reliably and the card no longer disappears from the system.

    References:

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