I am not sure if I have ever seen a more complete offering ... the National Geographic series here covers EVERY issue over a 120 year span on a 160 GB Hard Drive. Get it here for $200.
Explore 120 years of
amazing discoveries, fascinating maps, and the world's best photography
with The Complete National Geographic. This definitive collection of
every issue of National Geographic magazine, digitally
reproduced in stunning high resolution, brings you the world and all
that is in it. Use the advanced interface to explore a topic, search
for photographs, browse the globe, or wander on your own expedition.
Access
all of the maps, photos, and magazine issues found on the DVD
collection in one external hard drive. Browse and search the entire
collection without needing to swap out DVDs. Lightweight and
travel-friendly, the hard drive is just 3" x 5" and requires only a USB
connection. We’ve left plenty of hard disk space to accommodate future
upgrades. We’ve also allocated approximately 100GB of hard disk space
for your own personal use.