FunctionBrightspace
Student file submission download Yes can be downloaded (zipped file). All stored student submitted files are downloaded.  Download cannot be customised.
Multiple Files Submissions If each submission is more than a single file, then submissions may be downloaded in folders with the ‘Download all files’ button. Each submission is put in a separate folder according to date, files are not renamed. Each folder will be named with a unique identifier (not the user ID number), student name, date and time of submission. If a student has submitted more than once, different folders are created at the root level (i.e there is no top level folder for each single student)
Online Text Submissions Content of assignments set up as Text Submission are included as part of the zip file of all submissions.
Include students who have not yet submitted No, the download all files button only downloads a folder for students who have submitted.
Student audio/video submissionCan be downloaded if the audio/video has been uploaded by the student as an attachment. The video/audio files created through the Brightspace native functionality in Assignments tool cannot be downloaded. 
Student comments on submissionNo, the download all files button only downloads a folder for students who have submitted.
Assignment gradeYes, saves as a html file
Feedback: Instructor text, audio and video comments on gradingNo download functionality, would require manual archiving by instructor
Feedback: Instructor attached files on gradingNo download functionality, would require manual archiving by instructor