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- Canvas does not overwrite the files from previous attempts.
- In SpeedGrader, you can select (and download) the files from the earlier attempt(s), as shown in this screenshot.
Latest attempt file submissionupload (by default, Canvas will display the latest attempt):
Previous attempt file submissionupload (note the warning that you are not viewing the latest attempt):
- However, if you use bulk download the students' uploaded files, only the files from the latest attempt of each student will be downloaded.