Hi Heavy,
told you, easy he

.
But first: I'm not the author of this article. b0nfire is. Credit is due where credit is due
So for further questions please referr to him.
I'll try to answer your question as good an bad as it goes: simply upload a file o lets say 200 kb and take a look at your filedata table.
You will notice that the masterid will have several file_id's.
That what it is suposed to do: it chops up the 200 kb in different peaces and stores them as separate records (in the blob field) in the table.
This is relative to the size limitations of the blob-field type and this way the flexibility as decribed in the article is obtained. So therefore there is no limit of the binary data to insert.
Glad to be of any help.
Gijs