Disk space report of remote computer/servers through powershell

Script:
Param (
$computers = (Get-Content  "C:\Scripts\Computers.txt")
)

$Title="Hard Drive Report to HTML"

#embed a stylesheet in the html header
$head = @"
<mce:style><!--
mce:0
--></mce:style><style _mce_bogus="1"><!--
mce:0
--></style>
<Title>$Title</Title>
<br>
"@ 

#define an array for html fragments
$fragments=@()

#get the drive data
$data=Get-WmiObject -Class Win32_logicaldisk -filter "drivetype=3" -computer $computers

#group data by computername
$groups=$Data | Group-Object -Property SystemName

#this is the graph character
[string]$g=[char]9608 

#create html fragments for each computer
#iterate through each group object
        
ForEach ($computer in $groups) {
    
    $fragments+="<H2>$($computer.Name)</H2>"
    
    #define a collection of drives from the group object
    $Drives=$computer.group
    
    #create an html fragment
    $html=$drives | Select @{Name="Drive";Expression={$_.DeviceID}},
    @{Name="SizeGB";Expression={$_.Size/1GB  -as [int]}},
    @{Name="UsedGB";Expression={"{0:N2}" -f (($_.Size - $_.Freespace)/1GB) }},
    @{Name="FreeGB";Expression={"{0:N2}" -f ($_.FreeSpace/1GB) }},
    @{Name="Usage";Expression={
      $UsedPer= (($_.Size - $_.Freespace)/$_.Size)*100
      $UsedGraph=$g * ($UsedPer/2)
      $FreeGraph=$g* ((100-$UsedPer)/2)
      #I'm using place holders for the < and > characters
      "xopenFont color=Redxclose{0}xopen/FontxclosexopenFont Color=Greenxclose{1}xopen/fontxclose" -f $usedGraph,$FreeGraph
    }} | ConvertTo-Html -Fragment 
    
    #replace the tag place holders. It is a hack but it works.
    $html=$html -replace "xopen","<"
    $html=$html -replace "xclose",">"
    
    #add to fragments
    $Fragments+=$html
    
    #insert a return between each computer
    $fragments+="<br>"
    
} #foreach computer

#add a footer
$footer=("<br><I>Report run {0} by {1}\{2}<I>" -f (Get-Date -displayhint date),$env:userdomain,$env:username)
$fragments+=$footer

#write the result to a file
ConvertTo-Html -head $head -body $fragments | Out-File c:\Report.htm

**********************************************************************************
Note:
#Require Powershell version 2.0