“just browse the internet” doesn’t indicate that you don’t need a powerful computer in 2023. Modern browsers are really heavy - and rendering websites are much more complex now.
Unless you’re really frugal about your PC budget, I think it’s definitely “to-go” for 32G
KDE Connect: https://kdeconnect.kde.org/
I also use Resilio Sync. It’s not open source software, but it’s self-hosted https://www.resilio.com/
There are also open source sync services, like nextcloud or syncthing