Office 365 offers students larger quotas and storage limits.

Email Quota:   100gb quota.
See https://its.uiowa.edu/support/article/103894 for Office 365 Limits (attachment size, quotas, message size and more).

Sites Quota:  1gb per user per site (does not include OneDrive for Business)

OneDrive for Business Quota:  1 Terabyte total storage quota.   2gb file size limit for uploading/saving   To check your quota usage, see http://its.uiowa.edu/support/article/101408