Best way to sync file server?

$backTime = new-timespan -Days $backDays -Hours $backHours -Minutes 0
$searchTime = (get-date) - $backTime  # time used in looking back at the files updated within $backtime.  Lock it in at the start
       
 #get list of local files, oldest first
	$locFiles = get-childitem $searchDir -recurse -exclude *.url, *.lnk, *.sfprime, *.msg, *.eml | Where {$_.LastWriteTime -gt $searchTime}| Where-object {$_.mode -notmatch "d"} | Sort lastwritetime
	write-host $locFiles.count.toString() "updated within" $backTime.totalHours.toString("0.00") "hours."

	# collect array of directories in the lcoal file that are case file level dirs
	$locCL = get-ChildItem ($baseDir+$myDirSrch+"*")  | Where-object {$_.mode -match "d"}  | Select-Object name, Parent

	# Collect list of SF directories (this is within a loop)
		$dirStr = $baseDir + $curSub
		$sfSeek = $dirStr.replace($baseDir,$sfBaseDir).replace("\","/")
		$TEMPsfCL = get-childitem sfdrive:$sfSeek | select filename
		if ($sfCL.count -eq 0 ) {$sfCL = $TEMPsfCL}
		#echo $tempsfcl
		elseif ([Array]$TEMPsfCL.count -gt 0 -or [bool]$TEMPsfCL) {[Array]$sfCL += $TEMPsfCL}
	# Compare the two arrays of files to produce a sync list
		$locNotSF = compare-object -referenceobject $locCL  -differenceobject $sfCL -PassThru -Property FileName | where { $_.sideIndicator -eq "<="}
	foreach ($fName in $locNotSF) {
		$lFile = $fName.Name
		$lBpath = $myDirSrch.Replace("*",$fName.Parent.Name)
	#	write-host LF $lFile
		$lSrc = $baseDir + $lBpath + $lFile

		$SFtoLoc = $sfBaseDir + $lBpath.Replace("\","/")

		# double check that case file isn't there

		$SFdblChk = $lSrc.Replace($baseDir,$sfBaseDir).replace("\","/") -replace "\d{3}-\d{2}-"

		$sfFil = Get-ChildItem sfdrive:$SFdblChk -ErrorAction Ignore

		if (-not [bool]$sfFil) {

			write-host "Syncing: " $lFile

			# sync the folder

			Sync-SfItem -LocalPath $lSrc -Upload -Synchronize -ShareFilePath $SFtoLoc -Recursive

			# increment Counter

			$NSc ++

		} # only sync on double check not there

	} # end foreach item to sync