Issues with Raspberry Pi 0 WiFi Raspbian

Hi @drewmoseley

I have build and flashed the Image to theSD card, and booted also to my RPi zeroW.
It booted fine, got hit to the mender server also.
But when checking the free space in the RPI, I can see only 334 MB left (But my sd card is 16GB) , I saw different partition filesystem while checking the sd card, I understand it has different partitions,

But If I’m seeing only 334 MB,

  1. What happnd to there rest of the space since its a 16GB card ?
    2.Does it mean, I can only use this much from this point on my sd card? If so, Does it mean, I need a bigger SD card(32 gb ??)

FYI: Sorry I couldn’t type, its the screenshot frm the RPi:

image