So, here’s the deal: You’ve managed to acquire the data, but disaster strikes, and your time machine is destroyed by an enemy time traveler team. This is crucial historical data that you’ll have to get into the future to avert the apocalypse. Due to the constraints of the space-time continuum, all time travelers staying outside of their “home” time for longer than 1 year will die, so you have exactly 1 year to prepare. How do you make sure the future discovers the data, while preventing the enemy time traveler faction from stealing the data?
(Remember: don’t just chuck it in a hard drive and bury it in a forest somewhere, the data will degrade)
Store it optically in a single fused quartz crystal that is available today, then get that crystal put into an exoplanet lander going : Venus, Mercury or perhaps large moons like Titan or the Jovian moons.
We have a the technology today to send stuff to these far off places, but no ability to bring it back. In 100 years time there likely would be the technology. So even if “the enemy” knew I sent it to Titan and knew exactly where it was, they couldn’t read it.