Back in the early '2000s we had two home PCs with Windows (98 and 2000/XP), it was a breeze (relatively) to make the two PCs see each other in the LAN, using the legacy workgroup + shared folder/drive letters.
of course security was near nonexistent, but it was home LAN, and convenience trumped all.
Nowadays I have NO idea if I could do a similar setup with Windows 10 without resorting to the cloud