Yep, compression can do wonders. Let’s say A piece of data is 1010110010110101 repeating 10^10^10^10^10^10^10^10^10^10^10 times in a row. (No I didn’t screw up my notation there, that is just a massive number)

You cannot fit that piece of data on a hard drive uncompressed, yet I just communicated it to you in a compressed format and you can view the data accurately at any position.