How to identify traffic/file types

Hi, I'm very new to NTA, and am wondering if its possible to identify the file names/types that users are downloading on the network?

For example,

I drilled down into Top conversations, and found a user who has ingress of 1GB of data. Drilling further down, however, I can only see either the IP address or the domain of the host where the Ingress flow came from. It doesn't show what activity/type of traffic the user was using.

Thanks