Re-Installing Roon Server - A few Questions

I’m replacing the 4 mechanical 4TB WD Red disks in my DS415+ with 4 4TB WD Red SSDs. So I’ll be backing up my data and basically setting up the NAS fresh again. With respect to Roon, it’s been at least since the DSM7 upgrade that I’ve had to re-install Roon so I’m a little rusty.

1 - Roon is installed on the main volume
2 - Roon database is on a USB SSD
3 - Roon backups are on the main volume (specific folder)

Questions:

1 - Do I need to back up whatever is on the USB SSD? (or just leave whatever is on that drive alone?)
2 - Do I need to back up the backup? (is this just a backup of what’s on the USB SSD?))
3 - When I do a fresh install of Roon, if I point to the USB SSD will that help anything?

Or …should I just start fresh? I’m assuming the main consequence is that Roon will have to rebuild the library and do all the audio file analysis.

Again it’s been a while so apologies if my understanding is incorrect anywhere. Thanks!

Below are the folders on the USB SSD in case that helps identify what it’s being used for.

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