/// <summary>
/// Open folder
/// </summary>
/// <param name="storage"></param>
/// <param name="fileSystem"></param>
/// <param name="folder"></param>
/// <returns></returns>
private async Task <IFolder> OpenRootFolderAsync(IFileStorage storage,
string fileSystem, string folder)
{
var fs = await storage.CreateOrOpenDriveAsync(fileSystem);
return(await fs.CreateOrOpenSubFolderAsync(folder));
}
