I just relocated my entire library to a bigger NAS and everything worked just fine. Patching the file path -> done.
Everything, except Podcasts. Podcast tab is now empty. I thought about just changing the download path to the new network share over Settings -> Library -> podcasts download folder, but that didn't do the trick. Is there an easy way to just re-import the Subscription.dat/.bak (may need the bak, because the .dat is < 1kb)?