Hi,
I want to create a small application for android that will go to connected PC and copy some files from it.
It is clear that linux-based device can't do it directly, but i don't know where to start - i found no class that provides any access to a connected pc
Any help will be appreciated.

For this you have to implement your own client-server software and your own transfer protocol over network. PC runs your server and Android client can request files from it. This is the most legel and safest way of doing it.

or you can check the ftp: support in the SDK. This way you'll only have to implement an android ftp client. You can install an existing ftp server on the PC.

A small search returned me these results:

http://www.lysesoft.com/products/s3-buc ... d-android/
http://www.lysesoft.com/products/andftp/index.html

It is unlikely that the smartphone SDK would allow to browse PC filesystems directly.