if you have an old pc, that could be turned into a nas.
I would try to not spend that much on a nas right now since I am highly looking forward to see how the nas world will respond to ugreen joining with their beefy hardware. Because frankly it is quite dissapointing to see such weak CPUs being used in such expensive devices from the main 3 brands (synology, terramaster and qnap, synology being by far the worst one).
I will def hold off for a bit and see how things go with the NAS evolution as I first need to replace my UPS that died a while ago. The area of California that I live in sometimes has blackouts for no reason due to crappy power infrastructure and want to get power redundancy first to be able to gracefully power down my desktop and future NAS (and to mitigate potential data loss). 
I own the Eaton 3S 550VA and can confirm it is detected in my NAS.
it’s not so much about whether HDD or SSD are more reliable than which one is easier to recover data from.
so while HDD need a cleanroom to crack them open safely, the complexity of getting the data off them is not nearly as difficult as an SSD because the complexity of their electronics pales in comparison to an SSD. they’re analog.
that’s why the RAID arrays for online storage are so freaking complex!!!
Thank you. I think NAS is the way to go.
yes…RAID 6 with one or two hot spares and definitely two cold spares. I do a lot of media NAS and storage servers for surveillance systems for highly regulated industries that are required to maintain no less than 365 days of recordings with immediate recall should the regulators ask for anything.
they Synology DS1821+ is the most popular model I sell…8 bays with 8TB HDD. that would give you 24TB in RAID 6 with 2 hot spares…or 32TB with one hot spare or 40TB with no hot spares.
a lot of the time they have a second NAS at a different location as a clone, sometimes the same config, sometimes smaller where only particular data is backed up due to its lesser capacity. some go with a third back up… one on the cloud.
I’m getting myself a DS423+ soon and setting up a smaller DS124 or DS224 at my parents, in a dif province. the offsite clone should never be in the same geographic area as the primary because if there is a catastrophic event, both are likely to be affected. cloud is too expensive for personal use, so I’ll probably have an external USB HDD plugged into both with it duplicating particular info as a hail mary backup.