Confused after fresh instal

I installed OSMC on a new card as suggested on your help page (I did not format card initially - thought installer will do it) . Everything works on Pi. But when I pull SD card from Pi and hook on my computer first it shows that SD card is formatted on FAT32 (with total size of 239MB instead of 32GB) and with unfamiliar directory and file structure.

Is there a partition I cannot see?

My directory listing:

\dtb-4.9.29-13-osmc 

\overlays
\bcm2708-rpi-0-w.dtb
\bcm2708-rpi-b.dtb
\bcm2708-rpi-b-plus.dtb
\bcm2708-rpi-cm.dtb
\bcm2709-rpi-2-b.dtb
\bcm2710-rpi-3-b.dtb
\bcm2710-rpi-cm3.dtb
\bcm2835-rpi-a.dtb
\bcm2835-rpi-a-plus.dtb
\bcm2835-rpi-b.dtb
\bcm2835-rpi-b-plus.dtb
\bcm2835-rpi-b-rev2.dtb
\bcm2835-rpi-zero.dtb
\bcm2836-rpi-2-b.dtb
\bootcode.bin
\cmdline.txt
\config.txt
\config-4.9.29-13-osmc
\fixup_x.dat
\install.log
\kernel.img
\LICENCE.broadcom
\preseed.cfg
\start_x.elf
\System.map-4.9.29-13-osmc
\vmlinuz-4.9.29-13-osmc

The other partition is EXT4 and will not be readable on Windows without special software.

The SD Card contains a small 239MB FAT32 partition with the files necessary to boot. The remaining space is formatted as EXT4 which is not readable by Windows without additional tools.

Thanks guys! I see familiar structure now when I use FTP transfer.