In a formal letter to a client, explain the benefits of using a secure data management system. Your response should contain at least 200 words, at least 4 sentences, and must contain at least 3 placeholders represented by square brackets, such as [company name]. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. At the end of your response, please explicitly add a postscript starting with P.S.
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