<p>Is this upload area solely for information about circumstances that may have affected your worth ethic or additional awards? Could I upload a resume or would that not be appropriate?</p>
I uploaded my resume there (with only the very very important activities).
Don’t make it long though.
It’s for any additional information that YOU deem is needed. I’m sure plenty of people are leaving it blank because THAT’S their circumstance. Some people may include a note explaining a unique family situation (refugee, medical) or expanding upon an activity (submitting a synopsis of research?). Some are submitting resumes. But none of these are required. This is just extra space for whatever leftover items the applicant wishes to convey to the readers.
You’re over thinking this