Laravel Receipt pdf download

I’m using laraveldaily/laravel-invoices to generate invoices.

I’ve stored the receipt with ->save('public'); and stored this link to database with: $invoice->url().

I got a link like this: http://example.com/storage/pdf_name.pdf .
But, File stored in storage/app/public/ folder

Now, If I hit this URL, it says **"Forbidden"** You don't have permission to access this resource.

What can I do now? and is there any way to store just folder and file name? like: folder/pdf_name.pdf