(adsbygoogle = window.adsbygoogle || []).push({}); right so what can i do with a e3 card reader if i am on firmware 4.00 and i only have one ps3

You need a ps3 on 3.55 in order to use the E3 Card reader to jailbreak. You need a modchip like an E3 Flasher or progskeet to downgrade your ps3.

You can use the E3 Card Reader as a flash drive if you put a micro sd card in it.