bleepingcomputer[.]com/news/microsoft/microsoft-windows-issue-causes-file-copying-saving-failures/
This is Not something most people will experience -- posting the info just in case. Microsoft says for those experiencing the problem it's intermittent, so just try again and most times it will work.
The intermittent issue only affects apps that are large address aware and are also using the CopyFile API on Windows 11 21H2 and 22H2 (after installing KB5023774 or later issued updates) or Windows 10 21H2 and 22H2 (after installing KB5023773 or newer updates).
According to Redmond, there have been no reports of File Explorer's file copying functionality being affected; however, the CopyFile API used within specific applications may be impacted.Microsoft Office apps like Word and Excel are susceptible to this problem only when utilizing 32-bit versions, with impacted users potentially receiving "Document not saved" error messages.