Tbh, if you're that nervous about crossing the border with data, I'm sure you could find other ways to use the internet and decent encryption (behind multiple layers and/or people with a Deadman's switch if you're really paranoia and worried a judge will force you to unlock the precious 4mb worth of information) to protect your data when crossing a border.

Or probably even safer if you're talking about just 4mb of data: send it from a random address in one country to a postbox in your destination or something by post. Tampering with mail carries a pretty heavy fine in most countries, chances a random postman opens a random envelope to a random address abroad are basically non existant. Security through obscurity.

I like reading about infosec, but some of it borders on absolute paranoia tbh :)