Google Drive for Education is now on for everyone with a University of Sheffield Google account. Announced late Septemeber, Drive for Education gives each of us unlimited (yes, UNLIMITED) Google storage. So, you no longer have to worry about hitting that 30GB limit when sharing non-Google files like photos and word documents. In fact you can now store files of up to 1TB.
As before the space is split between your Google Drive, GMail and Google+ Photos. Here's how it's counted:
All non-Google file types use your storage. Anything that you create with Docs, Sheets or Slides won’t use up any of your storage.
Attachments sent and received in Gmail, as well as your email messages use your storage.
Photos bigger than 2048x2048 pixels use your storage. Everything smaller than that is free.
To check how much storage you are using (not that you need to): go into Drive and in the bottom left corner, hover over GBs used information e.g. 7GB used.
Here is Google's announcement: Going back to our roots: Google Apps in higher education