Correct. Also for curiosity I did a test on my host and Mac VM. Program reported on both Windows and Mac VM same speed of ~500 MB/s (which translates into 4.8 Gbps for OP style). On Linux I got ~450 MB/s. I used Total Commander in all cases (my normal file manager) and used my Witcher 3 .iso file as test (66 GB in size).
I think you are misreading/misunderstanding the performance of modern NVMe SSDs.
SATA based SSDs which it sounds like you have, top out at around 550MByte/sec.
However a PCIE 3.0 NVME can easily achieve 3500 MByte/sec throughput. That's saturating the PCIE 3.0 x4 link. PCIE 4.0 based SSDs are even faster, with advertised 5000MByte/sec throughput (but in testing may top out slightly slower than that)
Aye, it's SATA. PC is from 2013, old badly, planning this year to make a new one. But it covered me in past 7 years quite nicely. I made a quick math with my wife when she complained why I need a new one since this one is still good. Calculated that in past 7 years she paid 20% more in her cell phone subscription then me in buying/upgrading the PC all these years. And it was the work horse with at least 10 hours daily running, average of 16 and plenty of times stayed on for days.
