XP folder compression - Is it safe???

[Colin_da_Killer]

I am running out of disk space and have a lot of big audio and video files within folders, is it safe to compress these (they are quite important files). Will it yield much free space? (the files take up 120GB) how much can I expect from that?

 

[Colin_da_Killer]

I already have 4 hard drives, Can't fit anymore than that.

Anyone want to swop a 40GB ahrd drive with a 300GB with me? Please?