[server] Ubuntu Server 16.04 Crashplan in LXD container?

I've re-purposed my last build as a file/media server and backup. I'm using Ubuntu server headless but am trying to figure out how I can implement Crashplan. I know it will work if I install it on my main server OS (in headless mode), but would it be better to install it inside a lxd container and mount the Host drive inside that container? Or should I install it on the host OS and give Crashplan reduced rights on the file system as read-only. I'm new to Linux to some degree. I've been reading on lxd which looks interesting but is there a flaw in the logic to let the container see a file system in the host OS? I know I can mount the FS in the container as read-only. I haven't searched for a solution to run Crashplan on the main OS with reduced rights, but lxd seems better from that point. I'd like to run other apps in a container as well, such as a Plex server. Then again it needs to access a drive that doesn't exist in the container and I cant copy 2TB of movies to the container FS.

Any advise would be great.

Thanks.