Tape
There we go then..tape isn't dead, official. For those who really really need it...
Australia's first pass at the Square Kilometre Array – the Boolardy Engineering Test Array – is about to get commissioned into a fully-live system. The test array, known naturally enough as BETA, is part of the science-before-the-science: a proving ground for some of the new technologies being used for the SKA project, in …
Not to mention, shipping tapes is a fair bit easier than hard disks. If you send a tape through the post, you can be pretty sure it'll arrive intact. If you send a hard drive, there's a fairly high chance that it'll get ruined by someone throwing the package across a warehouse.