Hi
I am running CHR on a VR with 50Gbyte local disk and thats the way the VM provider works. Cannot create partitions or add secondary disks.
Is there any way to use the local disk which CHR is running from for containers or adding aditional disks is mandatory?!
Thanks!

Yes, you can do it. However there's a bug at the moment, where if you update the RouterOS version, existing container files which are stored on the main disk of chr, will become inaccessible/"permission denied" (SUP-92866). So I would discourage doing this until the bug is fixed. Unfortunately another new rc version was just released and this bug is still not corrected, so it's a waiting game as to when we will see the fix... just keep an eye out for container changes in the release logs

I was avale to use my main disk for mountpoaints and also the container space. It has been working fine on a VPS with CHR.