What's a good NAS and server system under CAD$900 (USD$658)?

I am currently using an old laptop (circa 2015) with a 250GB SSD in it, and 4GB of RAM. It runs Fedora 39 Server, and only hosts a Jellyfin instance through Docker right now (though I want to use Nextcloud later too). There is only 15GB of storage left on it, and the CPU is constantly overloaded (due to forced transcoding). I...