How do I receive large files from a Dropbox user without a paid account?

Hello, community! I have a paid Dropbox business account. Plenty of storage space, etc. I recently shared a folder with a colleague to exchange large video files, but she does not have a paid Dropbox account. So far, this means I can save video files and she can download them, but she keeps getting an error trying to upload her large files into my shared folder. Any advice, other than perhaps she should upgrade to a paid account?