https://mdbootstrap.com/angular/components/inputs/#file-input

I've installed MDB Angular Pro via NPM. In which case, this:

import { UploadFile, UploadInput, UploadOutput } from 'your_path_to/typescripts/pro';
import { humanizeBytes } from 'your_path_to/typescripts/pro/file-input';

should be
import { UploadFile, UploadInput, UploadOutput } from 'your_path_to/typescripts/pro/file-input';
import { humanizeBytes } from 'your_path_to/typescripts/pro/file-input';

And it would be nice if the documentation addressed the difference between import statements from the manually downloaded product and the NPM installed product.