You can have your profile for another PS3 only as a Playstation Plus user. You can not download just your profile into something connected to the USB port
if you mean from a pc to a ps3 then when you have to do is put the files which you want on the ps3 onto a usb and then put the usb in one of the ps3 ports and the copy them into your data
No you can not load or download games into or from the PS3 with the USB port
they charge after you have put the usb wire into the ps3 usb then pluged the other end into the controller
You can't.
If you download them to a USB drive then you just plug the drive into the slot on the PS3 and download into the PS3. There are even USB adapters for memory cards so you can download from your camera's card
No you only can put it on a usb stick
You can put the game save data onto an external USB drive
That's easy. You just put it in one of the usb port's at the front
No the USB does not work to load and modify games when the PS3 software has not been modified
by connecting with via usb PS3 can not connect to the internet with a USB modem
You don't. PS3 controllers are also for PS3 consoles that have a USB
no the PS3 must be connected to the internet with WiFi or ethernet cable the USB ports will not allow internet connection