Hi
I don't understand why you want to use Outsystem for this.
This is a common issue, that more related to infrastructure than application.
You can use many other methods to achieve this.
Anyway, You can try to implement SQL bellow in Outsystem to get free disk space.
SELECT DISTINCT
VS.volume_mount_point,
((VS.total_bytes / 1024) / 1024) AS total_MB,
((VS.available_bytes / 1024) / 1024) AS available_MB
FROM sys.master_files AS MF
CROSS APPLY sys.dm_os_volume_stats(MF.database_id, MF.file_id) AS VS;
Kind Regards,