Should You Use Windows%u2019 Full-Drive Compression to Save Space?. Who could have predicted that 128 Gigabytes of storage capacity would be not enough? So, when my computer warned me that I only had 7 Gigs of storage left on the drive, it was time to engage the nuclear option. Compress the sucker. My analytic software told me I could save 57 Gigs of space. But, compressing and decompressing files on the go used to be really slow. Of course, nowadays we have fast SSDs and Core i7 processors. So, after a little research, I realized that modern compression wouldn’t be noticeable in my day to day computing. As you you? Much depends on how new your computer is, how fast the processor is, and whether you are still using a mechanical hard drive or a fast SSD. You be the judge. But, a lot of my files are about to get smaller.