

Thanks a lot for this elaboration!
Unfortunately, like mentioned in another comment below, Barracudas are now mostly SMR. And I didn’t find offers for Barracudas Pro which should be CMR.
Anyways, I will most probably buy some smaller CMR drives. Take a bit more money in the hand now, lay out a proper backup strategy and only store data which can not be easily re-downloaded and I should be good.

Thanks a lot, again! I think I will focus on active and backup drive (+remote for the few essentials) and only use RAID if it is easy (and cheap) to implement.
Do you have any tips how to implement the powering on and off automatically? And would it be possible to have both in the same case or is it necessary to separate them physically?