I'm running on e3 card reader with hermes v4b. i cannot seem to save any game anymore, the ps3 always prompts that there's not enough space in the hdd. i deleted 10gb worth of game data/demos from the int hdd, but it says the same thing.
when i check the system information, it says 0/74gb.
If you use "Rebuild Database" you delete your folders and playlists. Use "Restore file system" as thats keeps everything intact. It's like a scandisk. It checks for errors and fixes them if any found. If its not registering the correct free space use this and it should fix it.
If it doesn't then yes, do a "Rebuild Database" but it will delete all folders and playlists. Games, saves, music, etc are all still there, just not in folders/playlists anymore.