If you want, you can delete those emails (I wouldn't delete the contacts or calendar), and if you don't change anything else, that .pst will be opened every time you open Outlook, and they will be searchable.
If you want, you can delete those emails (I wouldn't delete the contacts or calendar), and if you don't change anything else, that .pst will be opened every time you open Outlook, and they will be searchable.