Many companies are incorporating external compliance requirements with their own internal needs. When considering what kind of logging you'll need, start with those internal and external needs as drivers. That said, there are a few general logging capabilities that most business will want:
About the only thing you can't expect an audit log to include is why the transfer was made–although if you track the who, they can hopefully answer that question, if needed. But there's more that you should expect in the log: errors. File transfers aren't always smooth and problem-free, and a detailed activity and error log can make it easier for administrators to troubleshoot problems.
Our 2016 survey of global IT teams is in. Find out how important they find data security and compliance and how they are mitigating the risk of data loss.