declare @driveName varchar(100)

declare @query varchar(1000)

declare @fsinfo varchar(1000)

set @driveName = 'C'

set @query ='fsutil volume diskfree '+@driveName+':\'

set @fsinfo = 'fsutil fsinfo volumeinfo '+@driveName+':\'

exec xp_cmdshell @query

exec xp_cmdshell @fsinfo

check this T-SQL