For specific SSD and HDD types of systems that are fully updated, the freshly released Windows 11 24H2 upgrades appear to be resulting in data corruption and failure issues. Following the KB5063878 security update and the KB5062660 preview update, a Japanese PC building enthusiast first pointed out this problem on Friday, noting that drives with Phison NAND controllers were disappearing from the operating system during heavy write activities such as big file transfers or numerous files concurrently.
Though rebooting the system brought back certain impacted discs, others remained unavailable (read Microsoft’s August 2025 Patch Tuesday fixes). First highlighting this bug, the user also suspected it might be caused by a drive cache issue brought on by a memory leak in the OS-buffered region. Users reporting comparable issues have experienced this problem on systems with Corsair Force MP600, Maxio SSD, KIOXIA EXCERIA PLUS G4, KIOXIA M.2 SSD, and many drives using Phison PS5012-E12 and InnoGrit controllers.
SanDisk Extreme Pro, Corsair Force MP600, Maxio SSD, KIOXIA EXCERIA PLUS G4, KIOXIA M.2 SSD, and other drives using Phison PS5012-E12 and InnoGrit controllers have also been reported to have problems on systems. Redmond has yet to officially acknowledge this problem, but a Microsoft representative told BleepingComputer that the company is “aware of these reports and is looking with our partners.” Phison, a NAND controller maker, said that it is “working with Microsoft to solve the issue.”
“Phison has recently been made aware of the industry-wide effects of the KB5063878 and KB5062660 updates on Windows 11 that potentially impacted several storage devices, including some supported by Phison,” a representative remarked. “We understand the disruption this may have caused and promptly engage industry stakeholders. At this time, the controllers that may have been affected are under review, and we are working with partners.”
Windows users are urged to avoid writing large files, tens of gigabytes, or several big files in rapid succession until this issue is resolved; they should instead choose to write them in smaller chunks over a length of time.
