And it only said how to install opensuse on a partition with an existing operating system. I’d like to install it on a different partiont. Does anyone know how this can be done without getting grub errors?
Yes this is quite possible and is what most people do starting out with linux so they can still have windows but also boot into linux.
What you’ll have to do first is allot room for openSUSE to be installed on your current hard drive. Usually the installer will do this, as it says on that page. So go ahead and try to install onto your computer and let the partitioner resize the windows partition. If it says anything at all about deleting any partitions come back here and tell us. We’ll need to take a closer look at your hard drive.