Posted on June 5, 2013December 20, 2018 by Vinny PanneWriting To The Blobstore Using The Files API A short code snippet showing how to write data to the Blobstore using the experimental Files API. FileService file_service = FileServiceFactory.getFileService(); AppEngineFile file = file_service.createNewBlobFile(mime_type, filename); FileWriteChannel write_channel = file_service.openWriteChannel(file, true); ByteBuffer buffer = ByteBuffer.wrap(byte_array); write_channel.write(buffer); write_channel.closeFinally();