M.2 SSDs have almost zero idle power draw, if that‘s what you meant?
HDDs can spin down and will not draw much in that state. I think it‘s a reasonable assumption for a file server at home that it will spend most of time in spindown.
I have seen some problematic reports on external enclosures on Reddit, but maybe they do work fine in many cases.
May be almost zero, but it's not zero! I have never tried DRAM-less NVME SSDs, but I have some samsung SATA 840-870 ones (tried several on this range) that consume around 0.2W on the most idle state they support. Considering my budget was 2W, it is not negligible...
HDDs can spin down and will not draw much in that state. I think it‘s a reasonable assumption for a file server at home that it will spend most of time in spindown.
I have seen some problematic reports on external enclosures on Reddit, but maybe they do work fine in many cases.