There is a 100MB total limit for Individual Lockers for the following users:
Super Admin, Professor, Special Course Admin, Guest Lecturer, TA, TA (No Editing), TA (No Grades), Student, Student (PastAccess), Auditor
Lockers can be used for by all users, but was designed as a student-centric tools, with the intention of being used for a student’s personal storage for documents for uploading later. The second most useful use is for group document sharing for working on the same documents.
Group lockers have a size limit of 5mb.