Looking for a way to let users upload files to be used for projects, designs, etc.? Dropbox has made this much simpler with Drop Box File Request. You can add the link to a website page or email it to customers. If you put it on a website you can choose to add it to a page that requires login. Don't worry, customers uploading files won't be able to other customers files only their own. Load files with the Basic (free) or Plus version up to 2 GB and Professional and Business plans allow for file upload to 20 GB. Read More at https://www.dropbox.com/guide/business/share/file-requests-user.