Relax And Recover for os level backups. https://relax-and-recover.org/
With rear you can back up your system to pretty much anything. Mounted volume, USB drive, even to a bootable iso.
I use weekly rear backups for my system, and hourly Borg backups for diffs/point in time restore of user data, but you could use rear for an entire system snapshot as well.
Managing a legally procured library of media. Piracy is not the only way to get digital music, movies, and books.
Export controls or legal compliance, most likely. Export controls because the code may be a protected technology, or compliance because the company doesn't have gdpr or some other legal framework.
Web rings were one way someone would find their way around the Web before search engines really were any good. Basically, a group of sites of a certain interest would static link each other on each site.
Say you were on a web forum for skateboarders. That forum would have a web ring section, usually in the footer or one of the gutters, of links to other sites related to skateboarding. Each of those sites would reciprocally list the others as well.
If you published your own Website about skateboarding, you would email the webmasters of those sites and asked to be added; although some had centralized Webmasters to manage the ring.
REAR Relax-and-Recover will do entire system point-in-time snapshot backups to a bootable iso or physical USB thumb drive: https://relax-and-recover.org/rear-user-guide/index.html
I use rear for backing up my root, and Borg for packing up user data (for versioning, file recovery), but you can use rear for the entire system too.
OP Here's more info on using bindfs on this suggestion. Basically creating a soft link inside the 'movies' folder to the 'movies2/movie1 - 2160p.mkv' file https://github.com/jellyfin/jellyfin/issues/5521
Some can be. Didn't check to see if this was one of them. It's called 'Shucking' and there is a niche for it. Personally I don't think its worth it to go through all that work to research devices, go through all the effort to shuck it (and hope you're lucky!) just to save a couple bucks. https://www.howtogeek.com/324769/how-to-get-premium-hard-drives-for-cheap-by-shucking-external-drives/
To directly answer your question, what you need to run Jellyfin is a computer with sufficient CPU, RAM, storage, and networking. Many NASs can fill this role as can Single Board Computers (e.g. Raspberry Pi).
The QNAP you listed here doesn't seem to have Jellyfin as an app, but it does have Plex. You can find this information on the manufacturer Website.
Hardware: https://www.qnap.com/en-us/product/ts-233
Apps: https://www.qnap.com/en-us/app_center/?os=qts&version=5.1.0~5.1.3&II=616
The type of hard drive required for this NAS is 'internal', what you have linked as your hdd is an external USB drive, it wouldn't work the way you are intending. You need an internal SATA drive. Two would be ideal.
Internal SATA NAS drive: https://www.amazon.com/Seagate-IronWolf-Internal-Hard-Drive/dp/B084ZV4DXB/qid=1700590050
With a 4-core ARM cpu and 2GB of non-expandable RAM, I'm not convinced it would be a good Jellyfin experience. It could at first, maybe for one user at a time; but if you wanted to expand its capabilities (eg. have two streams at the same time), you might not be able to. YMMV
Rather than this QNAP unit, you could go with something that has expandable RAM and the Jellyfin app available to the OS. As mentioned in other comments, Synology is a well-known brand with lots of community support.
Hardware: Synology DS224 https://www.amazon.com/dp/B0C6927XPX/ref=twister_B0CLWLQCT6
Internal SATA NAS drive: https://www.amazon.com/Seagate-IronWolf-Internal-Hard-Drive/dp/B084ZV4DXB/qid=1700590050
Which very nearly doubles the price of the QNAP, but has expandable RAM up to 6GB.
If you're willing to learn a little bit of Linux and CLI, for the price, you can't beat a Raspberry Pi 8GB. It already has more RAM than either of those units can provide, is cheaper to boot, and would use the External HDD you selected. There was a shortage for a couple years with COVID, but with the release of the RPi 5, these are becoming available.
https://www.pishop.us/product/raspberry-pi-4-model-b-8gb/
There are MANY guides on setting up Jellyfin on Raspberry Pi, like this one: https://pimylifeup.com/raspberry-pi-jellyfin/
"Income tax on no income" is exactly what imputed income is, as mentioned by OP. Free perks from an employer are, for example, (in the US), taxed as income.
https://www.hrblock.com/tax-center/income/what-is-imputed-income/
Podman-compose is a python script that simply converts a compose file to 'podman run'. It worked fine enough for me, but the caveat being it doesn't have full feature parity and the errors aren't as good. The only thing I couldnt get working was connecting my GPU to jellyfin.
Turning conainers into systemd units is easy: 'podman generate systems --new --name $container_name › $HOME/.config/systems/user/$container_name.service' 'systemctl --user enable --now $container_name'
https://docs.podman.io/en/latest/markdown/podman-generate-systemd.1.html
The entire "Organize the store by Brand(TM)" rather than by product is a terrible consumer experience. Truly a horrible idea made by horrible profiteers.
Want to compare and buy an SD card? You need to go to the SanDisk section, the Samsung section, and the Other Misc Junk section. And btw the sections are on opposite corners of the store. Ain't nobody got time for that.