Hello,
Search for CMD in the search box, right-click and open it as administrator. Enter the following commands:
net stop camsvc
takeown /f "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager" /r /d y
icacls "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager" /grant administrators:F /t
del "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager\*.db-wal"
shutdown /r /t 0
Then check if the file usage has decreased.