my latest storage device...
2TB SSD NAS using a cheap HP 260 G1 USFF PC
its near enough silent - it has a CPU fan that never kicks in, even when transferring large amounts of files, especially as the CPU draws only 15 watts at most, but usually only 9watts
it doesn't support fancy stuff like RAID, but its so small, cute and unobtrusive
I've not added the optional WIFI, as I can't imagine I will need that, its constantly wired to my network supporting my porn plex PC
cost less than $100, including the 2TB SSD