Files/Folder chooser download files

If you received a shared link for a folder from the Dropbox Chooser, which would look like "https://www.dropbox.com/sh/...", you can then list the contents of that shared link using the Dropbox API, via the /2/files/list_folder[/continue] endpoints. You should supply the shared link as the "shared_link" parameter, and use the empty string "" as the value for the "path" parameter to list the contents of the root of the linked folder. (You can repeat with paths relative to that folder root to get nested folders, if desired.)

From there, once you know the paths of the contents, based on the result of the above call(s), you can then download the file(s).

If you are connected to the same account as the one that owns the shared link, you can use /2/files/download to download files using the paths (i.e., 'path_lower') returned by /2/files/list_folder[/continue].

If you are not connected to the same account as the one that owns the shared link, you can use /2/sharing/get_shared_link_file to download files using paths relative to the root of the linked folder.