I will unpack one and try to see/benchmark/investigate without removing it from enclosure. I can always return them.in tweakdown review is photo of
ST8000DM004 5400 rpm BarraCuda
That according to datasheet is 4platter drive and recording method is TGMR. Which sounds a lot like SMR drive. Found reddit thread about it and people in there wrote that its behavior is a lot better than 8TB archival drive.
Anyway, I snatched 3 pieces from amazon.de. Not as good price as in bestbuy but at least with free shipping
edit: I cancelled my order. decided I dont want SMR drives