Such a loss would apply to currently unsaved data and may not worry some. Compression employs special drivers to squeeze more data into the same volume of disk space. Disk compression can gain you 1.5 to 2 times the amount of current hard disk storage. Older systems typically have small disks and compression can be a life-saver. However there is, inevitably, another side to the story.
Compression reduces performance .
It increases the risk of data loss . It is difficult to determine the degree of risk involved. It makes freeing-up conventional memory more difficult which could be a problem if you use true DOS for games or other software. Be sure you fully investigate the most recent compression software first.