Is this not DriveSpace all over again?
https://en.wikipedia.org/wiki/DriveSpace
Well no it's not the same it has several differences but the two major are:
One, it can shrink storage up to 100 times, unlike traditional compression which saves 50-70% with prohibiting performance loss. Two, data access can actually be up to 100 times faster, while in traditional compression data access for many small files can be too slow.