Determine the amount of free space (in GB) for the c:\ drive

PowerShell Help
1

This is what I have so far.

Get-ciminstance -class cim_logicaldisk | where-object {$_.Freespace} select-object Freespace,DeviceID

I need to convert it to GB and output it as that. Any help would be appreciated.

2 
Get-CimInstance -ClassName cim_logicaldisk | Where-Object {$_.FreeSpace} | 
Select-Object @{n='FreeSpace';exp={"{0:N2} GB" -f ($_.FreeSpace / 1GB)}},DeviceID
3

Thank you!