15 years is too long, it doesn’t match the state of the industry or technological progress.

How is this too long? I would consider it a reasonable amount of time to receive security updates on a computer.

I have a notebook that I bought in 2012. It can run Ubuntu LTS 24.04, which is supported until 2034, without issue. There is no indication that the next release will stop supporting this hardware. I don’t see why Microsoft couldn’t provide this.

I’m not quite sure what you’re trying to do here. Are you

1. Trying to create a new owncloud instance and put your data somewhere other than in /var, or
2. Try to move the data location of an existing owncloud instance?

If you’re trying to do the second one, there’s a useful guide on it here: https://omiid.me/notebook/25/move-docker-volume-to-bind-mount. The first one should be even simpler, you can just replace the volumes in the compose file by bind mounts (basically, just this step of the tutorial: https://omiid.me/notebook/25/move-docker-volume-to-bind-mount#modifying-docker-compose).