I am new to vim, and I use netrw as a file explorer.

Frequently hit shift-P to open a file in a buffer. Sometimes I accidentally hit shift-O, and netrw will start obtaining the file. How do I cancel cancel that?

The above documentation, suggests that the message will end when the transfer completes. So maybe I need to cancel the transfer. I scanned/searched the above documentation for the words cancel and transfer and found nothing to suggest a fix.