https://www.reddit.com/r/PowerShell/comments/7o56v8/get_hard_disk_information_wanimated_graph/

Get-DiskStatus.ps1

# Run this script to see connected hard disk status with nifty bar graph!
$myDisk = Get-WmiObject -class win32_logicaldisk
$myDisk | ForEach-Object {
    $free = ($_.freespace)
    $total = ($_.size)
    $used = $total - $free
    $perUsed = ($used / $total) * 100
    $perFree = ($free / $total) * 100
    $t = [math]::Round($total / 1gb)
    $f = [math]::Round($free / 1gb)
    $u = [math]::Round($used / 1gb)
    $pu = [math]::Round($perUsed)
    $pf = [math]::Round($perFree)
   
    Write-Host "Volume:    "$_.VolumeName
    Write-Host "DeviceID:  "$_.DeviceID
    Write-Host "Total:      $t/Gb"
    Write-Host "Used:       $u/Gb"
    Write-Host "Free:       $f/Gb"
    Write-Host "% used:     $pu%"
    Write-Host "% free:     $pf%"
   
    # Create bar graph
    function drawBar {
        # Max width of bar
        $Width = 30
        Write-Host '[' -NoNewline
        # Loop that animates the bar also scales the percentage so bar does not take up too much space
        (1..$($pu / 100 * $Width)) | ForEach-Object {
            # Tracks how many ticks to draw
            $tick++
            Write-Host "$([char]0x25A0)" -NoNewline
            # Smaller number, faster animation
            Start-Sleep -Milliseconds 5
        }
        # Calculates how much free space at end of the graph
        # Loop draws empty space and end of graph
        (1..$($Width - $tick)) | ForEach-Object {
            Write-Host ' ' -NoNewline
        }
        Write-Host ']'
        # Makes space between reports
        Write-Host "`n"
    }
    #Calls bar graph function
    drawBar
}