Now that I've uploaded and matched everything, I want to trust in the cloud. Can I delete everything off my computer and just use my stored Match collection from iCloud?Sure. Apple doesn't require you to have a local copy of your files, so you can theoretically match and upload everything to the cloud, then delete all those files from your computer. We will say, however, that while it's likely that the iTunes Match servers are ironclad, and there's little risk of losing your data, flying without any backup is never something we recommend. (If you want to save space on your main computer, you should make a copy of your iTunes Media folder and stick it on an external drive, at the very least.)
mer info på lenken under:
http://news.idg.no/cw/art.cfm?id=C0E98C65-0D00-936E-3460F301EFB07EAD