Apps and configuration fo Boox M96

Hi,

I've bought an used M96 and like to know some tips of configuration and apps.

Other thing, did my device was updated? If it was what is the version?
In every site I've read say that it has 4gb but on the setting->storage only shows 2.3gb. Is something wrong?

My Kernel Version is:
3.0.35
jenkins@HP-Z220-DFF-Workstation #1
Fri Jan 16 14:46:06 HKT 2015

Build number:
2015-01-16_14-43_1.6.6_59e7565

One more thing: I've tested the pen from Samsung Note 10.1 and do not work with M96.

Thanks in advance for any help.