# Sample: read-only local disk inventory. No remote hosts or credentials.
[CmdletBinding()]
param([ValidateRange(1,99)][int]$WarningPercent = 15)
$ErrorActionPreference = 'Stop'
Get-CimInstance Win32_LogicalDisk -Filter 'DriveType=3' |
    Where-Object { $_.Size -gt 0 } |
    ForEach-Object {
        $freePercent = [math]::Round(100 * $_.FreeSpace / $_.Size, 1)
        [pscustomobject]@{
            Drive = $_.DeviceID
            FreeGB = [math]::Round($_.FreeSpace / 1GB, 1)
            FreePercent = $freePercent
            Status = if ($freePercent -lt $WarningPercent) { 'Review' } else { 'OK' }
        }
    }