NFC isn't unlimited, and the bitrate is very low. For a storage medium, it's not really very suitable for files. It would probably make more sense to embed a URL, with the actual data hosted online.
> NFC tags are passive data stores which can be read, and under some circumstances written to, by an NFC device. They typically contain data (as of 2015 between 96 and 8,192 bytes) and are read-only in normal use, but may be rewritable.