Got it. The Send Document feature helps with the file limit, but isn’t convenient for your customers to download files.
Another Onix Work user recently posted his product idea to let recipients of Send Document download multiple files more easily: Allow non-Onix-Work users to download multiple documents at once.
You might want to check it out. If you like the idea and think it helps in your case too, you can vote for it and share your thoughts there 
Based on the discussions, our team can better understand the need and prioritize it.