I agree with this objection to the hard-drive analogy. Some of the pro-cryonics arguments like the examples of wood frogs, & human drowning victims/coma/flatliners as well as what is currently believed about how memory is stored go some way to showing that memory & personality are closer to hard drives than RAM, but are far from conclusive. I've suggested in the past that would close down this objection would be training some small creature which can be vitrified & revived successfully, and verifying that its memories are still there, but as far as I know, this has never been done.