Microsoft 365 offers students larger quotas and storage limits.

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

OneDrive for Business Quota:  1 Terabyte total storage quota. 250GB file size limit for uploading/downloading. To check your quota usage, see http://its.uiowa.edu/support/article/101408