Hi @ljk19
Welcome to the Canvas Community. If you are talking about a file uploaded to the group Files area, you should be seeing a "Last Modified by" column heading that will show you the possible person who uploaded it, unless, of course, someone else modified that file later. If, however, you are referring to an assignment submitted as a file upload, there is really no way to tell. In fact, this is pointed out in the blue area at the top of this specific lesson: How do I assign an assignment to a course group?
Notes:
- In group assignments, one submission will count for the entire group. Learn more about evaluating group work.
This is a common question, but it's the nature of the beast with group work in Canvas, as anything for that group represents a group effort, as it were.
Hope this helps a bit, LJ, even if it may not be the answer you're looking for depending on the circumstances.
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