Useful insights, these. Thanks to
@SachinChavan,
@shyamv and
@dub123
I compiled a list for each:
HDD:
Larger in size
Needs power (higher capacity ones)
Has moving parts; wear and tear is inevitable.
Makes some noise while internal motor and disk are spinning
Cheaper (per GB/TB) as compared to SSD
Introduces less electrical noise into signal path as compared to SSD.
SSD:
Smaller in size
Feeds power off player or streamer
Introduces more electrical noise into audio signal path
Faster read/write speeds
No mechanical noise or wear and tear, but electrical failure still possible?
More expensive compared to HDDs with same capacity.
Did I miss anything important?
Reviewing the list and considering which matter most to me, I feel longevity/reliability, lesser noise (mech and elect) and cost would be main decision making factors...
it also occurred to me just now that I have read about high capacity SD cards.
Any thoughts on the use of these for music storage and playback (with a card reader)?