Originally posted by diehardslet
if i click on check on ps3ita manager it says Explore_plugin_3.55.sprx: invalid filename in /dev_hdd0/game/ps3itau_0
You could try reinstalling the same firmware you're already on, in this case it's ita 4.70 and see how that goes.
Other wise If I was you I'd just quick format my PS3. That's up to you though.