Curent Word on current Mac fails to save a file to Mac

On macOS, Microsoft Word may occasionally encounter issues saving files locally due to complications with temporary file handling, underlying disk errors, or insufficient file system permissions. Microsoft has formally recognized this behavior and provides official remediation guidance, which includes verifying available disk space, repairing file and folder permissions, and confirming that AutoRecover and temporary file creation processes are functioning as expected.

 

Save a file in Office for Mac - Microsoft Support

 

Fixes or workarounds for recent issues in Word for Mac - Microsoft Support

 

There is a serious disk error on when attempting to save, copy and paste or create auto recovery files in Office for Mac - Microsoft Support