SharePoint SubSite Size Storage Report

#Get Size of all Sub-sites in a Site Collection
[void][System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")

# Function to calculate folder size
Function CalculateFolderSize($Folder)
{
    [long]$FolderSize = 0
 
    foreach ($File in $Folder.Files)
    {
        #Get File Size
        $FolderSize += $file.TotalLength;
   
        #Get the Versions Size
        foreach ($FileVersion in $File.Versions)
        {
            $FolderSize += $FileVersion.Size
        }
    }
    #Iterate through all subfolders
    foreach ($SubFolder in $Folder.SubFolders)
    {
        #Call the function recursively
        $FolderSize += CalculateFolderSize $SubFolder
    }
    return $FolderSize
}

 
$SiteURL = "https://sharepoint.company.com/"
$Site = new-object Microsoft.SharePoint.SPSite($SiteURL)
 
foreach($Web in $Site.AllWebs)
{ 
	#Call function to calculate Folder Size
	[long]$WebSize = CalculateFolderSize($Web.RootFolder)

	#Get Recycle Bin Size
	foreach($RecycleBinItem in $Web.RecycleBin)
	{
	   $WebSize += $RecycleBinItem.Size
	}

	$Size = [Math]::Round($WebSize/1MB, 2)
	Write-Host  $web.Url ":`t" $Size "MB"

	#Dispose the object
	$web.dispose()
}