if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) { write-error "You must run this script from an Administrator PowerShell instance"; return }
$UsbstorControlRegKey = "HKLM:\SYSTEM\CurrentControlSet\Control\usbstor"
$DisableSuspendOnIdleBitmask = 0x400
$drives = @(gwmi win32_diskdrive)
$usbstor = @(gwmi win32_pnpentity |
    ? {$_.service -eq "usbstor"} |
    %{ $u = $_
       $drives | %{
           if ($u.DeviceId.Contains($_.SerialNumber)) {
             $u | add-member -name UsbDiskFriendlyName -value $_.Caption -MemberType NoteProperty -Passthru
             return # "break" out of inner foreach
         }
       }
       if (-not ($u | get-member UsbDiskFriendlyName)) {
           $u | add-member -name UsbDiskFriendlyName -Value "(No friendly name)" -MemberType NoteProperty -Passthru
       }
    } |
    %{ $_ | add-member -name VidPidHwid -Value $_.HardwareID[1] -MemberType NoteProperty -Passthru } |
    %{ $vidPidCompact = $_.VidPidHwid -replace "USB\\VID_|&PID_", ""
       $_ | add-member -name VidPidRegKey -Value ("$UsbstorControlRegKey\$vidPidCompact") -MemberType NoteProperty -Passthru } |
    %{ if (-not (test-path $_.VidPidRegKey) `
           -or -not (get-itemproperty $_.VidPidRegKey | get-member DeviceHackFlags -ErrorAction SilentlyContinue)) {
            $_ | add-member -name RegValueOrZero -Value 0 -MemberType NoteProperty -Passthru
        } else {
            $_ | add-member -name RegValueOrZero -Value ((get-itemproperty $_.VidPidRegKey).DeviceHackFlags) -MemberType NoteProperty -Passthru
        }
    } |
    % { if ($_.RegValueOrZero -bAnd $DisableSuspendOnIdleBitmask) {
            $_ | add-member -name SuspendOnIdle -Value "Disabled" -MemberType NoteProperty -Passthru
        } else {
            $_ | add-member -name SuspendOnIdle -Value "Enabled" -MemberType NoteProperty -Passthru
        }
    } |
    % -Begin { $i = 1 } {
        $_ | add-member -name i -Value $i -MemberType NoteProperty -Passthru
        $i++
    } |
    select DeviceId, UsbDiskFriendlyName, VidPidHwid, VidPidRegKey, RegValueOrZero, SuspendOnIdle, i)

if ($usbstor.count -eq 0) { write-error "No usbstor devices found "; return}

function FinalActions($usbstor) {
    # Do everything after the point where input is required in this function.
    # Therefore the last line of the script can be the one that gets input.
    # Therefore the whole script can be pasted.
    $i = $input | select -first 1
    $usbstor = @($usbstor | ? {$_.i -eq $i})
    if ($usbstor.count -ne 1) { write-error "Invalid input: $i"; return }

    $usbstor | %{
        if (-not (test-path $_.VidPidRegKey)) { mkdir $_.VidPidRegKey | out-null }
        Set-ItemProperty -Path $_.VidPidRegKey -Name DeviceHackFlags -Value ($_.RegValueOrZero -bXor $DisableSuspendOnIdleBitmask) -Type DWord
        if ($_.SuspendOnIdle -eq "Disabled") {
            $_.SuspendOnIdle = "Enabled"
        } else {
            $_.SuspendOnIdle = "Disabled"
        }
        $_
    } | ft -auto i, UsbDiskFriendlyName,SuspendOnIdle, VidPidHwid
}

$usbstor | ft -auto i, UsbDiskFriendlyName, SuspendOnIdle, VidPidHwid
Read-Host "Toggle SuspendOnIdle on which USB drive number (1-$($usbstor.count))?" | . FinalActions -usbstor:$usbstor