go under network settings on your ps3 and turn off searching for media servers
doing this will fix your issues
i found this out because when i first went online my dad's router did not support any type of media sharing and the computer would show up on my ps3 for a moment then the router would i think sort of crash as all the lights would be blink like crazy til media sharing was turned off
a 3 years plus bump for routers 101 basics which are normaly in the quick start guide of the router.
In you PC browser you type in the quick access IP address for your router. Normaly on the quick start paper work...
are normaly the default... of many routers...
you can normaly reset routers to these defaults buy holding the reset button of the router in for 10 seconds but this is not needed if you are allready online you just look the number up on the network setting as the default gateway is normaly the router IP address...
SIEE PS3/PS4 Beta Tester
From SIE blog firmware 4.50 post "There is no guarantee that all USB storage devices are compatible with your system."