public async Task AssignLetter()
{
var sut = new LowLevelApi();
var phoneDisk = await sut.GetPhoneDisk();
var partitionToFormat = (await sut.GetPartitions(phoneDisk)).Single(x => x.Number == 6);
var toAssign = await sut.GetVolume(partitionToFormat);
await sut.AssignDriveLetter(toAssign, 'I');
}