type: cmd and hit Enter
at the command prompt navigate to the directory containing wsusutil.exe
(default: C:\Program files\Microsoft Windows Server Update Services\Tools)
and run command:
wsusutil.exe movecontent "D:\WSUS Update Packages" D:\logfile.log
this assumes you want to move update files to "D:\Wsus Update Packages" (you must create folder prior moving contents) and D:\logfile.log is where logs for this operation go.
If you do not want to copy all content to the new location add -skipcopy flag to the end of command wsusutil.exe movecontent "D:\WSUS Update Packages" D:\logfile.log -skipcopy