Use this -
DECLARE @full_path VARCHAR(1000)
SET @full_path = '\SERVERD$EXPORTFILESEXPORT001.csv'
SELECT LEFT(@full_path,LEN(@full_path) - charindex('',reverse(@full_path),1) + 1) [path],
RIGHT(@full_path, CHARINDEX('', REVERSE(@full_path)) -1) [file_name]
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