Ok so got a bit further,

 var imageFiles = Directory.GetFiles(_config.ProfileImageFileLocation);

        foreach (var file in imageFiles)
        {
            var fileItem = new FileInfo(file);

            Console.WriteLine($"uploading file {fileItem.Name}");

            var media = _mediaService.CreateMedia(fileItem.Name, _config.ProfileImagesFolderId,
                _config.MediaTypeAlias);

            using (FileStream fileStream = fileItem.OpenRead())
            {
                media.SetValue(Constants.Conventions.Media.File, fileStream);
            }
            _mediaService.Save(media);
        }

However I do not see the image itself, I am using blob storage so dont know if that has something todo with it or whether it does not like filestream being passed?

Hmm to image is set to System.Io.Filestream. So maybe base64 encoded is required?

Have a look at the imagefilter content app. That has the ability to save files so might help.

So after a little advice from Ronald on slack https://our.umbraco.com/Documentation/Reference/Management/Services/MediaService/Index/#creating-a-new-media-item-from-a-stream

I updated my code so it now looks like:

                var fileItem = new FileInfo(file);

            Console.WriteLine($"uploading file {fileItem.Name}");

            using (var fileStream = fileItem.OpenRead())
            {
                IMedia media = _mediaService.CreateMedia(fileItem.Name, _config.ProfileImagesFolderId,
                    _config.MediaTypeAlias);

                media.SetValue(_contentTypeBaseServiceProvider,Constants.Conventions.Media.File, fileItem.Name,fileStream);
                _mediaService.Save(media);
            }

This has got a bit further in that in media section the source of the image is correct its an actual url as opposed to what i had before "System.Io.Filestream" however the image still gives 404

is working on a reply...