New to this forum, and here for a reason.....I hate trying to search some things on the net. Who wants to spend hours checking all the site suggestions when there are experts here that know the answers off the top of their head.

I have an olddddd Sony reader, one of the first out. It has no backlight, small memory, and tends to turn itself off or lock up constantly. I have quite a few gigs of books in varying types (epub, mobi, pdf...etc) and I need a reader that supports the most types and is capable of memory expansion with micro sd cards.....all the other bells and whistles are nice, but I really care most about memory and ability to read most formats......
Thanks in advance,
Lykos33