Hypothesis - I wonder if this is about places with lot of movement vs places that don't. Internal movement within US, even within rural communities, might be more than in Germany? and so, society tends to be more accepting of new incoming people?
This is also the reason why we need to ensure our OS systems remain open, so that we can craft the super customized app for our needs, and be able to install it on our devices easily
You can build your own NAS, but for a much simpler way to start, buy couple of external drives and use Stable bit Drive pool application, along with https://github.com/rclone/rclone