In the town of Castelnuovo Garfagnana (2,5 km from Pruneta di Sopra property) there are supermakets and shops for food supply.
Conad (near the local stadium);
Simply City  (in town center, near the main square);
Many other small shops such as bakeries, butcher shops, typical food shops etc...
Another supermarket, not far from Castelnuovo, is Coop, in Pieve Fosciana;
A very big supermarket (open from 8 to 20 all the days, also on Sunday) is Conad Superstore located in Gallicano, 8 km far from Castelnuovo di Garfagnana.