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KB5063878 is widely reported as causing problems with SSD drives that have a Phison controller, there is no problems reported with HDD's.
Microsoft have indicated they are working to resolve the problems with that update, if you have not installed KB5063878 yet, do not install it, pause your updates, if you have installed KB5063878 then try to avoid transferring large amounts of data like 50GB to/from that drive until the problems in that update are resolved.