Clean OS (Debian), OpenMediaVault and other "firmwares"

I followed the installation instructions and all went smoothly. I have sda1 as swap sda3 as system and sda2 for my data. However when I try to create a shared folder no devices show in the drop down menu. I’ve tried unmounting and mounting sda2 and still no joy, Any help appreciated. I have a 2TB gen 2 mycloud. Thanks
James

SOLVED - deleted the sda2 partition and after recreating I was able to mount within gui and create shares on the sda2 partition. Not sure why it wasn’t working