That is because on the CD the files are nor wav's which are very large (say 10MB per minute) when you rip from the CD to the PC it does so in a compressed format (mp3 or wma) which is about 1MB per minute.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.