One zip with the document and every media file, stored uncompressed. The zip is a Blob made of small headers and the media files themselves, so no media byte is copied into memory; each file is read once, a chunk at a time, for its checksum.
One zip with the document and every media file, stored uncompressed. The zip is a Blob made of small headers and the media files themselves, so no media byte is copied into memory; each file is read once, a chunk at a time, for its checksum.