What's wrong with the dropbox?
Quite a few things actually.
The very simplest as has been mentioned would be that it requires people to go to another site, in another tab, to find it and then to do whatever is required to actually download the file.
is blocked in your country?
Unlikely - or was that simply facetious? I might put that back to you however, it would be courteous to at least include your country in your profile.
If no, there's no need to spam forum disk and save some IOs to server.
That would most certainly be the pot calling the kettle black. XD