Apple TV 4K - 32 or 64? How do I know what the capacity is?

I have had an Apple TV 4K basically collecting dust for a few yrs. Looking to sell it on Facebook Marketplace at the appropriate price point, but I forget what size it is. How do you check the size?

A quick search says: Settings > General > Manage Storage, but that only lists what apps are installed, not total size capacity

Thanks