static void Main(string[] args)
{
const int STORAGES_COUNT = 3;
Storage[] storages = new Storage[STORAGES_COUNT];
storages[0] = new Flash();
storages[1] = new DVD();
storages[2] = new HDD();
Console.WriteLine("Количество памяти во всех носителях: " + AllStoragesCapacity(storages));
File someFile = new File();
someFile.SomeData = "WinRAR-Archive";
someFile.Size = 2000;
storages[0].CopyFiles(someFile);
storages[1].CopyFiles(someFile);
storages[2].CopyFiles(someFile);
Console.ReadLine();
}