C:PS> Get-Volume

DriveLetter FileSystemLabel FileSystem DriveType HealthStatus SizeRemaining      Size
----------- --------------- ---------- --------- ------------ -------------      ----
C                           NTFS       Fixed     Healthy           94.34 GB 237.96 GB
            Recovery        NTFS       Fixed     Healthy           10.19 MB    300 MB

C:PS> Get-WmiObject Win32_Volume | Format-Table DriveLetter,Capacity,FreeSpace

DriveLetter      Capacity    FreeSpace
-----------      --------    ---------
C:           255505461248 101292863488
                314568704     10682368

Get-WmiObject Win32_logicaldisk -filter "driveType=4"

PS C:> Get-PSDrive -PSProvider filesystem

Name           Used (GB)     Free (GB) Provider      Root
----           ---------     --------- --------      ----
C                  48.92        195.13 FileSystem    C:
D                  30.82         69.18 FileSystem    D:
E                    .12        121.49 FileSystem    E:

PS C:> Get-PSDrive -PSProvider filesystem | select Name, @{n= 'Used(GB)' ; e = {"{0:N2}" -f ($_.used/1GB)}}, @{n= 'Free
(GB)' ; e = {"{0:N2}" -f ($_.Free/1GB)}}, @{n= 'Total(GB)' ; e = {"{0:N2}" -f (($_.used + $_.Free)/1GB)}} | ft -auto

Name Used(GB) Free(GB) Total(GB)
---- -------- -------- ---------
C    48.92    195.13   244.04
D    30.82    69.18    100.00
E    0.12     121.49   121.62