There are two categories of data compression. The first reduces the size of a single file to save storage space and transmit faster. The second is for storage and transmission convenience.

A compression technique that does not decompress digital data back to 100% of the original. Lossy methods can provide high degrees of compression and result in smaller compressed files ...

Right now, Steam uses a different compression method called LZMA (Lempel-Ziv-Markov chain Algorithm) for chunks of game data that are 1MB in size. The change was shared in a post by the creator of ...