PowerShell local disk property no output - properties

Question

I am building report for disk but need help, please. Here is the code:
$outputs = #()
$disks = get-wmiobject -class "Win32_LogicalDisk" -Filter 'driveType=3' -namespace "root\CIMV2"
foreach ( $disk in $disks ) {
$output = New-Object PSObject -Property #{
deviceID = $disk.caption
FileSystem = $disk.fileSystem
FreeSpace = $disk.freeSpace/1GB
Size = $disk.size/1GB
VolumeName = $disk.volumeName
used = "{0:N1}" -f ((("{0:N1}" -f ($disk.size/1gb)).ToString().replace(",",".") - ("{0:N1}" -f ($disk.freespace/1gb)).ToString().replace(",",".")) / ("{0:N1}" -f ($disk.size/1gb)).ToString().replace(",",".") * 100)
used2 = $used
}
$outputs += $output
}
$outputs | select deviceID, VolumeName, size, used, used2 | Format-Table
Everything is fine, but nothing in variable used2
deviceID VolumeName Size used used2
-------- ---------- ---- ---- -----
C: win 49,1992149353027 87,4
D: data 170,701168060303 70,7

Answer 1

$used doesn't exist as a variable in that scope, so used2 is being set to $null.
You need to create a variable $used before calling New-Object. Also, you're doing far too much formatting in calculating the used percentage - save the formatting until the very end. Below, I've made both changes
$used = "{0:P1}" -f (($disk.size - $disk.FreeSpace) / $disk.size);
$output = New-Object PSObject -Property #{
deviceID = $disk.caption
FileSystem = $disk.fileSystem
FreeSpace = $disk.freeSpace/1GB
Size = $disk.size/1GB
VolumeName = $disk.volumeName
used = $used
used2 = $used
}