The two things I can think of are the company may try to tag you for inappropriately handling what they consider confidential information – and if something goes to court and the email ends up in the discovery process, opposing council may be allowed access to your entire personal email account.
It’s probably better to copy everything as an attachment to a dedicated portable drive so it’s less likely to be called out by the company, and if it ends up it court you only need to release the information on that drive.
So what if they know you have it?
The two things I can think of are the company may try to tag you for inappropriately handling what they consider confidential information – and if something goes to court and the email ends up in the discovery process, opposing council may be allowed access to your entire personal email account.
It’s probably better to copy everything as an attachment to a dedicated portable drive so it’s less likely to be called out by the company, and if it ends up it court you only need to release the information on that drive.
This would get you fired from some jobs.
Most companies have software to identify what you’ve copied to an external drive as well.