[Mashimo]

A lot (but not all) of modern drives past the 8 TB mark are Helium filled. They are airtight.

[justinclift]

With sufficient time and motivation, that's not really a barrier. ;)

[paulmd]

even if you get it open, you better have a plan to refill it, because the helium is needed for the head to float above the platter properly.

[justinclift]

Of course, that's a given. ;)

[brcmthrowaway]

Does it have an air inlet??