real weird thing just happened to me.
I knew from looking at the system info that I had about 100gb left. I transferred about 90gb worth of games.. and then I started getting the "less than 500mb left" warning. I hadn't actually played any of the games yet so it's not like they installed additional content on the HD.
Then.. instead of using multiman to go and delete a game (which I realize is what I should have done), I used blackbox ftp to delete the folder of a 30gb game (uncharted 2). I saw the ftp delete 372 files in front of my eyes. Most of them were listed as being 450kb but I think that's an anomaly with FTPing and due to the ps3 filesystem being weird.. we don't see the actual filesizes via ftp (or the timestamps) ... right ?
So anyway.. I reboot on the ps3 a couple of times.. and it still says less than 500mb left!! wtf ? So then I used multiman to delete another 10gb game and this time it freed up the space immediately.
Any idea what's going on here? How do I can recuperate that lost space? Or is it possible that the PS3 kept trying to upload files even though it had run out of space.. and it created a bunch of dummy files instead of the real files? And that's why when I deleted Uncharted 2 nothing seemed to happen space-wise ? Just a theory.. trying to understand this.
Thanks for your time..