Hello
I want to transfer a joomla 2.5.28 with k2( about 1500 items ) to a fresh installed joomla 3.4.1 with k2 site.
Can anyone tell me a safe procedure to do that?
If i use akeebabackup expect the k2 tables what other tables should i move?
Thank you in advance

I would personally update the 2.5 site itself.
If that is not possible, you would also need to transfer all the user related tables so you won't break any dependencies.

Thanks Krikor
I transfer k2 tables , user tables from the old site through phpmyadmin, copy the images folder together with media/k2 folder and everything is working fine at the new site.
Thanks again

You 're welcome Pantelis :)