very slow download

Hi there, 

Welcome to the Box Community!

I'm sorry to hear that you are experiencing slowness with downloading files in Box.

We listed some tips and guidelines that may help resolve the issue you encounter, can you please go over them and let us know how it goes:

• https://support.box.com/hc/en-us/articles/360044196153-Common-Issues-with-Downloading-Files 

Thanks!