the backup script on my VM.

mybackup.ps1

param(
     [switch]$quiet
)
$zipExe = "C:\Program Files\7-Zip\7z.exe"
$dateStr = '{0:yyyy-MM-dd}' -f (Get-Date)
$buFileName = "\\my-machine\c$\Users\me\Documents\backup\VM_MyDocBU_" + $dateStr + ".7z"
$myDocs = "C:\Users\me\Documents"
pushd
cd $myDocs
& $zipExe a -r $buFileName $myDocs
popd
if (!$quiet)
{
     Write-Host "Press any key to continue ..."
     $x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
}