Google Takeout is an app that allows anyone to transfer files from their school account to either their home computer of their personal Google account.
If you wish to directly transfer files to your personal Google Account then you are limited to which files you can transfer. If you wish to down your data as an archive or zip file then you have additional choices.
The video below explains how to transfer files from you school account to your personal account.
If you wish to download your files as an archieve, the video below explains that process.
Below is written tutorial about how to create an archive of the files. Click here to down a copy.