Are you using Amazon EBS Cold HDD (sc1) volumes? If so, how are you doing it? I'm looking at the EBS and monthly storage for 2TB would be $50 ($600 a year), so I assume I'm not thinking of doing it the way you're doing it!
ah that makes sense, I've not heard them called that before.
Um - I think rust is meant to be a pejorative term for iron oxides whatever the substrate, old disks used to be reddish brown before they designed the layer to be almost impossibly thin
Off topic in regards to the deal. AWS ec2 is the way forward, create a job to snap your data and if needed you create volumes from your snap. No need to worry about HDD and SSD dying on you. Storage charges are miniscule.
If you're writing important data on a regular basis, increase the frequency of the backup. The whole HDD Vs SSD reliability thing is subjective without data to back it up. Too much blind faith either way. I've had several HDDs die in an instant, despite being monitored by HDD sentinel. This is why I recommend regular 321 backup regardless of the storage medium. It would be irresponsible of me to suggest otherwise, just because I'd had luck with a particular type of storage.