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Potential SSD Detection Bug in Windows 11 24H2 Following Update KB5063878 (August 12, 2025)

Titus Tolbert (Sr. Dev Operation, Hoka corp) 340 Reputation points
2025-08-28T02:39:36.0933333+00:00

I had installed Windows update KB5063878 on August 12, 2025, and get multiple reports have surfaced from my users indicating a critical issue affecting M.2 solid-state drives (SSDs).

Observed Issue:

After installing the KB5063878 update on systems running Windows 11 version 24H2, some users experience disappearing SSDs—i.e., the drive is no longer detected by the system. The issue seems to occur under the following conditions:

  • The SSD is more than 80% full
  • A continuous write load of ~55 GB or more is applied
  • This is commonly observed when downloading or installing large files, such as modern video games

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Any confirmed information or guidance about this ? Thank you

Windows for home | Windows 11 | Windows update

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  1. Haytham-C 1,350 Reputation points Microsoft External Staff Moderator
    2025-08-28T07:16:50.8033333+00:00

    Hello Titus Tolbert (Sr. Dev Operation, Hoka corp)

    Thank you for reaching out to Microsoft Q&A and informed about the issue. As far as I known, the issue with SSD disappear after install update KB5063878 has been reported by many other user and Microsoft have indicated they're aware and currently working on a patch for this issue. However, there is a simple workaround for this, please reboot your PC, since a simple reboot can allow the driver to re-appear in Windows.

    In case after reboot and the SSD still having issue, please submit your feedback via Microsoft Feedback Portal

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

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  2. DaveM121 764.9K Reputation points Independent Advisor
    2025-08-28T08:03:16.34+00:00

    There is a confirmed problem with the August KB5063878 update causing problems with SSD drives that have a Phison controller.

    If you have installed that update, then to avoid the problem, do not transfer large amounts of data to/from the SSD until Microsoft have patched the problems in that update, if you have not installed the update, then pause your updates until the September update is released or an out of band update is released by Microsoft to address the problem.

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