Back Up - Free Drive Space
One option would be to use XP_CMDSHELL and issue a simple DIR command and load the information into a table variable.  Then, delete the rows that don't have the word free and you should get the line that indicates the amount of free space.

DECLARE @DirectoryInfo TABLE (TextLine VARCHAR(max))

INSERT INTO @DirectoryInfo
EXEC xp_cmdshell 'dir &lt;YourRemoteDirectory&gt;'

DELETE
FROM @DirectoryInfo
WHERE isnull(TextLine, '') NOT LIKE '%free%'

SELECT *
FROM @DirectoryInfo




16 Dir(s)  6,247,769,628,672 bytes free