Problem:
You want to upload and/or archive your reports to DropBox, OneDrive, or other file storage systems.
Answer:
An export to DropBox or the likes is as simple as doing a normal File export to a directory.
On a machine, you have access to DropBox at something like C:\Users\Whatever\Dropbox. So, if it's installed on the machine with Report Runner Batch, you can get directly to it and simply do a File export to it or make the DropBox directory your main Archive folder and save everything there.