This was a replacement for an older  ACER chromebook that had its solid state HD crap out.It is hard soldered into the board so nothing could be done. It lasted over 7 years, tho.This new one is smaller, but has much updated hardware, and probably a replaceable SD storage.So far the battery life is very good, and the screen tho not very big is clear and bright.the keyboard is easy to use.  It has better wifi than the old one too.