This is the 5978th most frequent Russian word.
сетью
"Сетью" means "by/with a net" or "as a network" in English, depending on context.
Here, 'сетью' refers to an organization or network, specifically a network of stores. It is used in the instrumental case regarding utilization.
Она пользуется сетью магазинов для покупок.
She uses a chain of stores for shopping.
In this example, 'сетью' denotes a network, specifically the internet, indicating the medium used to share files.
Мы делимся файлами через сетью интернет.
We share files through the internet network.
In this sentence, 'сетью' is instrumental, indicating the means by which the action was performed, namely using a net.