You do complete background checks and go through references as part of your hiring processes. You continually and painstakingly train employees on security and data breach topics to make sure they are educated and will know what to do and not to do during the course of daily business.
You even conduct daily auditing of system activity and ensure that you are consistent with discipline at your workplace. On top of it all, you’ve even gotten cyber insurance. You’ve made reasonable efforts to protect your sensitive business files as well as data and your business. And, you trust your staff, so you naturally feel pretty confident that you are covered on all sides.