Rapid Recovery repository and storage size

I'm taking over a Rapid Recovery 6.3 environment.

The repository is running off of direct connected storage to the local backup server.

The storage arrays have SAS 7.2K drives.

My question, expanding or creating a new repository, is it better to create smaller storage locations with the data and metadata directories (by smaller I mean like 500GB or 1TB sizes) or would we be better with 1 large data file (like 20TB)?

I know for normal SMB transfers larger databases typically perform better than a bunch of small files, but I wanted to see what the recommendations are for Rapid Recovery.

I guess it also depends a lot on your storage, but  I'm just looking for suggestions/pros/cons.

Thanks in advance.