How much arrays on P212

[pksparks]

I got a Gen8 running windows server 2012 r2 essentials.

booting from odd bay, internal drives in 2 arrays.

also inserted an hp smart array card for extension.

in the Gen8 i have an extra 2,5 '' hdd for server backup, connected to P212 on internal connection, raid 0 single disk

today i connected a silverstone  431S to the external port with 4 hdd's. From these 4 i can only make 1 extra array, with spare disks. 

But not 2 extra arrays. 

And i would like this, just to replicate some of my serverfolders.

of course i also have an offsite backuplocation through internet, but i want to get rid of my on site qnap, as this is having problems with ftp after an update.

 

so my main question, how many arrays on P212??

and what is best way to duplicate serverfolder to this array??

 

thanks

patrick