Can't understand how to share folders as nfs shares

I got this after typing in terminal:

Exports list on 192.168.0.84:
/mnt/dietpi_userdata

when editing the export file In nano I get this:
mnt/dietpi_userdata *(rw,async,no_root_squash,fsid=0,crossmnt,no_subtree_check)

do I need to change anything except my download location?