Collection query to find all machines with 1 GB or more free space in C Drive

select SMS_R_System.ResourceID,SMS_R_System.ResourceType,SMS_R_System.Name,SMS_R_System.SMSUniqueIdentifier,SMS_R_System.ResourceDomainORWorkgroup,SMS_R_System.Client from SMS_R_System inner join SMS_G_System_LOGICAL_DISK on SMS_G_System_LOGICAL_DISK.ResourceID = SMS_R_System.ResourceId where SMS_R_System.Client = 1 and SMS_R_System.Obsolete = 0 and SMS_R_System.Active = 1 and SMS_G_System_LOGICAL_DISK.DriveType = 3 and SMS_G_System_LOGICAL_DISK.DeviceID = "C:" and SMS_G_System_LOGICAL_DISK.FreeSpace >= 1024