I am very close to running out of disk space on an IBM XP laptop (36 Gb, NTFS). I travel for work and use it for business. Because I am gone for extended periods, I decided to rip my entire CD collection to MP3s. Can anyone comment on any problems I might encounter if I compress this volume? Speed of access, corruption, security, etc. I would think that error checking and a defrag is in order before starting or is that part of the process? Is there any danger during the actual compression process?