Do you think the achievement of the previous companies should be archived?

I think the achievement I made in previous companies should be stored to prepare for my career path, but it's really hard. For example, I moved to my current company 1 year ago, and I've lost most of the achievements I made in the previous company. I wonder how detailed it should be and if you have the know-how. Is there an application that helps? If I make something for your career history, what kind of information should be kept?