Add questions that allow for file uploads - Microsoft Support

In Microsoft Forms, you can create questions that allow your responders to upload or attach files to their answers.

File Upload Question

Microsoft Forms now supports attachment uploads!, by Loryan Strant

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Penny-Wise Perfection Share a video or audio file across Microsoft

Unable to add Upload File type of question in MS Forms/ Quiz. - Microsoft Community

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Add sections to your survey or questionnaire - Microsoft Support

Upload Files in Microsoft Forms - New Feature!: Chris Menard Training

Using File Request to get Content from Anyone – Box Support

Microsoft Forms now supports attachment uploads!

Microsoft Forms - Lesson 13 - Adding a File Upload Question

Upload Files in Microsoft Forms - New Feature!: Chris Menard Training

Upload and share files - Microsoft Support