I am not sure that’s a question of talent, many websites make it intentionally hard to extract content from them (to get real visitors instead of bots simply downloading a file). Unfortunately, you didn’t provide example data (and I am not a Pinterest user) so I am not 100% sure how your URLs look like.
However, on a general level I think downloading multiple files and then passing them on to Dropbox could work like so (assuming you are running the most recent version of n8n):
Thank you! I could see the problem and it seems that one of the URLs you are reading is not publicly accessible. Opening https://i.pinimg.com/originals/8d/ca/63/8dca6337923e829f5ad6c22d5988de97.jpg will also result in an error outside of n8n:
PS: I have created this workflow using a recent version of n8n. You didn’t specify which version you are running, so you might need to upgrade your n8n instance before you can import my example workflow.