The manufacturer means something like 1'000'000h MTBF https://www.seagate.com/www-content/datasheets/pdfs/ironwolf-16tb-DS1904-14-1907US-en_CA.pdf

75,000 MB/s corresponds to 75 GB/s. No hard disk in the world can do that. You always have to distinguish between internal and external transfer rates. The external one is limiting here: 6 Gb/s (SATA III), which corresponds to 0.75 GB/s. This is the absolute maximum you can expect from the hard disk. From experience I can tell you that with a 'normal mix' of files over 10 min you will reach a maximum of about 23 GB/min. However, I am very satisfied with the hard drives in my NAS. However, they are not intended for a workstation or a gaming computer. There are other, more suitable products, mostly in 2.5" format or - better - SSD (NVMe).

I've purchased this a little less than one month ago from Digitec and the one I received is the VN001 model.

The ST6000VN001 is included in the following: https://www.seagate.com/www-content/datasheets/pdfs/ironwolf-16tb-DS1904-16-2005DE-de_DE.pdf and is listed on the page https://www.seagate.com/de/de/internal-hard-drives/hdd/ironwolf/#specs