To know your computer DRIVE Space using SQL Server

Just copy below code and execute in your SQL Server, you will get your Driver free Space:

DECLARE @OSDriveSpace TABLE
(
  DriveNm char(1),
  FreeDriveSpaceInMB int
)

INSERT INTO @OSDriveSpace
EXEC master.dbo.xp_fixeddrives

SELECT *  FROM @OSDriveSpace