I opened up a thread about which HDDs to get for long term storage but I've just ordered a Verbatim 43888 external drive with bunch of 100 GB M-Discs.
The reason for this is because I was looking for a mixing session from 2015 I wanted to dig out for sampling some drums and both HDDs on which the session was failed.
However, I found an M-Disc I created at the time which was stored in a very humid and also sun exposed storage environment which apparently has the session on it.
I cleaned it quickly from dust and dirt that gathered on it, just stuck on a free spindle, popped it into my PC with an internal Blu ray drive and voila, it read immediately and all the data was intact.
I think all newer HDDs are way more prone to data loss and defects than the ones from the early 2000s which is why I'm simply going to burn all my important data now on M-Discs.
I just felt like sharing this for someone who thinks about NAS and data backup.
I still have a local NAS to access my sessions but anything I want to keep permanently, I'll make a copy of on M-disc for now.