Oké seems 000400e also has content but no data :-/
maybe that has the faulty installed files by the previous person ...
Since i still believe he did something wrong ....
Well, for now all is apparently in order. Now, try this using GodMode9: open it (pressing START on boot), then choose with the directional buttons (UP/DOWN) the "[A:] SYSNAND SD" option, now press the R+A combo and select the "Fix CMAC for drive" option (accept and unlock the security level as prompted), and wait until is done. Finally reset your console (pressing START) and see if your missing content appears again.
Once again I fell down the martial arts rabbit hole and am plumbing the murky depths of the internet's various martial arts and fighting crafts echo chambers.
If you're not actively involved and only get up to speed every few years or so, you can see the tide of public opinion flapping worse than my dong while I'm skipping naked down a hallway.