Is your feature request related to a problem? Please describe.
This is a frustration when we have requirement to restrict a file type we have to provide rather so many options that we should allow this is cumbersome.

Describe the solution you'd like
Provide the opposite to accept option and give a reject option that way we can just provide the ones we want to restrict

Describe alternatives you've considered
No good alternative aside from providing long list of accepted just to restrict one or two types

Additional context
Please implement