how did you save songs to your ps3 in the first place?
I setup a media server like a year ago, and got the songs from there.
so your songs are in media server rather than in PS3? am i correct? you should have jail broken PS3 to setup a media server on it.
whatever it is use some dlna app from playstore to get the music in your phone.
Can you transfer the songs to usb? Then back to your computer, upload to google music, sync, win?
What happens when you plug your N4 into the usb port? Does it recognize it as a media drive?
Have you tried bluetooth?Just shooting from the hip here.
Your phone's BT or the ps3's?
Worse comes to worse, buy a bigger usb drive....or if you're seriously broke...transfer album by album.
Either way, I suggest getting the songs back to your computer before your phone. Then upload everything to google music, then sync to your phone. you'll never have to deal with this again.