Get Disk Space PowerShell Function

Get-DiskSpace.ps1

[CmdletBinding()]
param (
    [Parameter()]
    [String[]]
    $ComputerName = $env:COMPUTERNAME
)

# Drive type lookup table
$driveType = @{
    0 = 'Unknown'
    1 = 'No Root Directory'
    2 = 'Removable Disk'
    3 = 'Local Disk'
    4 = 'Network Drive'
    5 = 'Compact Disc'
    6 = 'RAM Disk'
}

$result = [System.Collections.ArrayList]@()
foreach ($computer in $ComputerName) {
    try {
        if ($localLogicalDisks = Get-CimInstance -Class Win32_LogicalDisk -ComputerName $computer -Property * -ErrorAction Stop) {
            $result.AddRange($localLogicalDisks)
            if (($localLogicalDisks.DriveType) -notcontains 4) {
                if ($mappedLogicalDisks = Get-CimInstance -Class Win32_MappedLogicalDisk -ComputerName $computer -Property * -ErrorAction Stop) {
                    $result.AddRange($mappedLogicalDisks)
                }
            }
        }
    }
    catch {
        "[ERROR][$computer] : $($_.exception.message)" | Out-Default
    }
}
if ($result) {
    $result | ForEach-Object {
        [PSCustomObject]@{
            ComputerName     = $_.SystemName
            DeviceID         = $_.DeviceID
            VolumeName       = $_.VolumeName
            DriveType        = $(
                if ($_.DriveType) {
                    $driveType[$([int]$_.DriveType)]
                }
                else {
                    $driveType[4]
                }
            )
            SizeGB           = $([System.Math]::Round(($_.Size / 1GB), 2))
            UsedSpaceGB      = $([System.Math]::Round((($_.Size - $_.FreeSpace) / 1GB), 2))
            FreeSpaceGB      = $([System.Math]::Round(($_.FreeSpace / 1GB), 2))
            FreeSpacePercent = $([System.Math]::Round((($_.FreeSpace / $_.Size) * 100), 2))
        }
    }
}