Business plus plan speed limit?

Hi Jimmy, 

Welcome to Box Community and glad to assist!

Activities that affect bandwidth and monthly limitations include: 

• Downloads from a shared link .  Limitations:
  
  • Individual free account: 10 GB per month*
  • Personal Pro and Box Business Accounts: 2 TB per calendar month, per person* 
  • Bandwidth counts against the usage of the file owner, regardless of whether the owner creates the shared link.

  • All downloads from any public shared link count towards the bandwidth limit.  You can reach this limit quickly, depending on several factors:

    • the size of the files being shared
    • the frequency of downloads,
    • file format (GIF, FLV, MP3, and so on)

*However, this limit does not apply to:
- Downloads from within an account by the content owner 
- Downloads by collaborators while logged in to their account

• Files uploaded and downloaded.  Limitation:
  • 1TB per user per month for all plans (based on the person who uploads and/or downloads the file). 

This information is accessible through this article. 

Hope it helps!