I would like to see the presidential parden used for him. I think Snowden had honorable intentions but went about releasing the information (to trusted journalists) in the wrong way. I think he should have gone to the OIG, i dont think he did, and after trying that gone to journalists. However, i cant really fault him, its hard to know what to do in the moment. I probably would not have released documents in his place.
Archive multiple copies with something that has error-correcting codes. Use btrfs, zfs, par2, rar, raid-5, DVDs etc