If all you want to archive is text you might try printing it out. There are papers they reckon will survive 400 years (who validates the guarantee and is the receipt on the same paper?).
The problem with paper archive is twofold. The quality of OCR and the longevity of the ink -
xerographic processes should be OK but inkjet I wouldn't put any money on even if kept in the dark. Still my Cannon prints have survived 10 years with no appreciable dimming.
Flash memory makers claim sort of 100 years or a million reads levels.