I take great pride in folks NOT losing their hard gained history & media curation metadata.
If you look here
You’ll find I’ve been busy over the past few years (more work is coming) to help folks understand how PMS is implemented on their Syno boxes as well as how to get the most out of it.
In the FAQ, you’ll find where I show how to make perfect image backups of your metadata with ease (yep… EASY PEASY) that’s so good you can delete your metadata and it will restore it all perfectly.
Feel free to open a new thread and ping me (@chuckpa) and I’ll answer any questions you have.