Photoshop: How do I create a batch job that makes changes AND saves files?

In Photoshop: how do I create a batch job that makes changes AND saves files?
I can record actions to make changes to files.
But… I seem to not be able to save files in specific names.
For example, I want to make 10 images smaller, and want to save the new
version as originalName.small.jpg.

How can I do this?

I would have thought that you would need a script to make the new
naming?

Any help would be appreciated.

Thanks.

OM