Reading Digital Data without THE Connection

[Wellspring]

Some of us rely on our Internet connection or just "power alone" to access vital resource information necessary
to survive through difficult times.  I don't have a photographic memory (anyone know of ways to increase memory retention?) and most of my preparedness/survival info is on my computer.  I came across awhile back an interesting way of access data and can't "remember" what it was.  I believe it used some kind of old-style netbook configuration with low power use and some simple way of charging it.  That's about all I can remember. 

Anyone have a clue how to solve this problem?

TIA

[opsec]

I printed out everything I want to keep and put it in three ring binders.

[Atash Hagmahani]

Opsec is correct.

I don't know what will happen to the Internet. It will probably be heavily "defended" during "system crash", because so many people are dependent on it. We have a great many businesses now that are partially or completely dependent on it for mission-critical operations, such as order taking or customer service.

The internet itself will probably stay up, but a lot of websites will go down when their owners go bankrupt, and a lot of people will lose access when they need to choose between eating and internet.

I suggest more resilient backup.