It told me I had not enough space to run the game when I started it up this morning and asked to clear data to which I said "yes",then after it cleared and restarted gave me the warning "insufficient free space on Hard Disk Drive (HDD),At least 32MB required.Please exit the game and free up some space. 0x0000000b [60]".
So I then deleted all other game demo's,3 of them,and no matter what I tried no dice.At this point my brother's other games were all working but they became slower (that said still MUCH faster than GT5 NORMALLY is).I then checked free space and it said I had 64GB!
But even so I still tried different steps like re-installing the game data,backing up save data then re-installing it,disconnecting the internet cable then re-setting but nothing worked.
So then I restored the file systems in the PS3 (which does not delete save data) and after it restarted still same warning,so I then backed up the game data and restored entire system.