You can straight up download the whole human (reference) genome here. Just click download and it's in in a zip fasta format, which is basically a glorified .txt file you can view on Notepad++ or standard Notepad. It's about 3gbs. You can fit it in any flash drive.
Genome Reference Consortium Human Build 38 patch release 14 (GRCh38.p14) - Homo sapiens
Of course you wouldn't be downloading a single file but rather a file for each chromosome (including the mitochondrial genome). And on itself reading the data in text format isn't of much use, but there is software to study to the chromosome level (the fasta format is mostly used for small sequences of interest)
You could, theoretically, copy paste each fasta file in a .txt file but that would crash your clipboard. In bioinformatics people do this all the time, you concatenate these files that weigh lots of gigabytes, there are whole hard drives in my institute just for that.
Here's what it looks like if you're curious.
But yes if you want, you can straight up have the whole human genome in your hard drive.