Hola Benny!

 BP> with is standard microsd ?

Yes.  It is a branded 32G Sandisk.  Works okay but is very slow.  The 2.5" 
laptop drive(s) on powered hub adapter are noticeably faster when doing writes
despite them being limited speedwise to the USB2 interface.  I suspect msata 
will be the same as laptop drives when using a msata to USB adapter.  It would 
be
nice to see a future raspberry pi with a native msata controller chip.

 BP> its a hardware device on top of the pi with rtc and msata port

Excellent.  The rtc is definetly a desirable option.  I have a rtc and dc power 
input on a addon hat.  I haven't used the DC input yet but the rtc is what I
bought it for.  I wouldn't bother booting up the raspi3b+ without it.

 BP> since i need 5V/5A psu now

I am using a 5V/3.5A as we speak but plan to wire it straight into the 12VDC 
soon.

La vida es buena,
Maurice

... Un Møøse una vez mordió a mi hermana ...
--- GNU bash, version 5.0.2(1)-release (aarch64-raspi3b+-linux-gnu)