NCp with multiple drives

Hello together,

I started my ncp with one external drive on my raspi some time ago, now I will reach its maximum storage capacity soon. I did a lot of research in the last days, but I could not find any good information if it is possible to have one ncp instance with multiple external HDDs.
I also tried mounting a new drive, but I could not access both drives from nextcloud, I can only change my directory to the other one.

Do you know how to do this? Thanks in advance.

I found an answer: Install LVM and create one big volume. It is even possible to add storage later on.