MAC hard drive doing a vanishing trick?

First, I want to say that this is my DAD's Mac, I'm a loyal windows fan. With that off my chest: My dad has a powerbook G5 laptop. He was coming home from turkey today, and while on the plane, discover he couldn't save a 1MB file to the hard drive. Even though it showed 20GB left, it said the disk was full. Any ideas? Thanks.

Yes, Don't use mac in my opinion :P
if only my cousin was here he knows alot about mac he would be able to help,

all i can say is I HAVE NO IDEA :P lol if it was Linux/*NIX or Windows it might be abit different...

Sorry i can't help...

Jim,

Its not a G5 Powerbook. Its a G4. Anyway, in the applications folder then utilities there is a program called disk utility or something, its got a pretty obvious name - I just can't check because I'm at work and my Powerbook is at home.

Open that up and verify and repair disk permissions, there is another check you can do in there to that is basically like a scandisk for windows.

Thanks guys, will do.

I thaught File Permissions,

as that is what i would have Guessed with Windows and *NIX / Linux, just dunno a thing about MAC ... :dead:

Jim,