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Microsoft’s latest security update for Windows 11 is allegedly causing SSD failures during heavy file transfers. The issue was reported by X user Nekorusukii @Necoru_cat, who was updating Cyberpunk 2077 on a system running Windows 11 24H2 with the KB5063878 update installed, when the SSD on which the game was installed disappeared from the operating system.
An investigation by the user reveals a potential bug that appears during continuous file transfers on certain storage devices, particularly when the transfer exceeds 50GB and the drive is over 60% full. In these cases, the SSD can sometimes disappear from within the operating system. While restarting the PC makes the SSD visible again, the issue seems to occur again as soon as a large data transfer is performed again.
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Out of the 21 drives tested, it was found that 12 of them became inaccessible, but only the Western Digital SA510 2TB could not be recovered, even after a reboot. This indicates that the issue seems to impact SSDs with multiple types of SSD controllers.
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Latest Windows 11 security patch might be breaking SSDs under heavy workloads — Phison investigating reports of disappearing drives following file transfers, including some that cannot be recovered after a reboot
Some say continuous transfers exceeding 50GB can cause drives to vanish from the OS