Hi Katarina!
The snapped receipts are automatically saved in the For Review section of the Receipt tab on the Banking page, so there's no need to save them. They won't be saved on your phone either because they'll go directly to that section.
What you'll want to do next is review them or edit the captured information. You can find the detailed steps in this article: Capture and categorize receipts and bills.
If you have more questions, please don't hesitate to go back to this thread. Enjoy your weekend!