If you would like to download a student portfolio as an Administrator, you can download journals as an Admin via the Classes and Students tabs in school dashboard.
From the Classes tab:
1. Find the class that you want to download the journal of.
2. Tap [...] > 'Download Class Journal'.
From the Students tab:
1. Find the student that you want to download the journal of.
2. Tap [...] > 'Download Student Journal'.