Including new e-mail database in existing one

Good day,

I had to change my hard disk and had no time to make a back-up of eM. When installing eM on my new hard disk, I received and replied to e-mails without importing all my previous information.

If I copy “H:\Users\Username\AppData\Roaming\eM Client” from my old HD to my new HD, the newly created correspondance will be overwritten and disappear. Can I make a back-up of my new correspondance and somehow add that to the old correspondence once I moved the above mentioned file? If so, where would I find the back-up of my new correspondance?

Thank you in advance for your answers and help,