get-childitem "Q:\Data\" -recurse | 
Where-Object { $_.PSIsContainer } |   
Where-Object { $_.GetFiles().Count -eq 0 } |   
Where-Object { $_.GetDirectories().Count -eq 0 } |    
ForEach-Object { $_.FullName } |   
Out-File -FilePath C:\Users\user\Desktop\results.txt