Hi spadgett -
I never figured out an easy solution with Dropbox. If my coding skills were better, I'm sure I could have written something to make it work. Seems so easy for Dropbox to create a form with File Requests.
What I ended up using was Form+. I only needed to collect the files for a limited time so only paid for one month of Form+. The first month was free. I created a form and had all the files upload to my Dropbox. Each form entry was added to a Google spreadsheet. I'd use the spreadsheet to match the files to the entry. Still wasn't all that efficient, but the project I was doing was temporary.
What I was doing was collecting a photo from every family (small, private school). I needed the parent to upload the photo and tell me which classrooms they were a member of. So some families were in one classroom, while others were in 3 different classes. I would then use the spreadsheet with all the entries to see which classrooms they were part of and then copy the photo to the appropriate classroom folder. If Form+ had the ability to dynamically save the file to a folder based upon form input, this would have been much easier. It was still way better than using Dropbox File Request (different File Request for each class plus one folder for a family that was in multiple classes) and then emailing every parent when a file was uploaded to ask them for the names of the people in the photo (that was the info I needed to collect for every photo). Those families who had children in multiple classes required me to manually look them up to see which classes they were a member of. Form+ made the whole process 90% efficient.
Dropbox Plus has become an essential tool for me. The File Requests has been a feature I use most often for school work (I'm a parent volunteer). The ability to also link to a file on Dropbox has been essential, as well as the ability to share a Dropbox folder.