[Juno]

The ODROID N2 has removable high quality, fast eMMC flash storage modules available that can be user configured to any OS you want easily.
The CoreELEC edition of the N2, uses a more robust, Industrial spec. Sandisk microSDHC - but it will still be a bit slower vs eMMC flash storage.

Do You mean there is a dual boot on ONDROID N2?    

No, there is triple boot on Odroid N2. You can have Android (Pie 64bit, or TV 32bit) on eMMC, Ubuntu on uSD card and CoreElec on USB stick at the same time. With SPI-Petitboot you can choose which OS to boot.
You can even extend that with 2 operating systems om a single eMMC, so many OS combinations are available. 

Thx for tips!
How can i choose booting OS? There is a list on bootscreen? Can i set default OS?

I think may be its time to move from Wetek Core. I hope USB audio on ON2 is working flawless. On Wetek Core there are some clarckilng via USB. So if i can drop optical to USB i would be satisfied.
So i can have Android for HBO GO and CoreElec for audio playing.
Even i could try Daphile.