even taking your contrived example, you have to store it in the stupidest way possible to get that level of storage - even assuming your 1K of text is incompres

even taking your contrived example, you have to store it in the stupidest way possible to get that level of storage - even assuming your 1K of text is incompressible, you only have 1K unique values. The most basic compression algorithms will make easy work out of compressing the crap out of it, leave alone the advanced compression algorithms used for any big data storage formats.