So there isn't going to be a direct action to Copy a file since you are trying to go from OneDrive to SharePoint. You will need to use the SharePoint - Create file action. This is not much different than the SharePoint - Add attachment action.
I can't make a duplicate of your flow without seeing the expanded steps, but it probably isn't necessary. You have done the hard part already. To finally create a file in the SharePoint document library, it is going to work much like how you are adding the attachments to SharePoint.
Switch Create File
In my quick example the Switch is using the Choice response from the Form and then it will create a file in the identified folder.
Yours will probably be slightly different, so instead of a Create File action within each of the Switch Case, you will probably have an Apply to Each within each Case. And within that Apply to Each you will have the Create File action.
I'm guessing you could use the same "Add attachment to SharePoint list" step within each Switch case, but replace it with the action Create file.
You could put the Switch inside of an Apply to Each, but I think it looks cleaner to have it outside and then the individual Apply to Each for each case.
This requires that the document folders are already made and the form choice response matches each case. This also doesn't allow for a single form response to send photos to different folders; that would get more complex.
Do you think you can make it work like this?
(If you get stuck, let me know, but also add a screenshot of your steps opened up fully so I can copy what you have. Then I'll make a complete example.)
