Upgrade or buy new?
Upgrade or buy new?
Everyone agrees that increasing to 32GB (two times 16GB) would be a better choice.
The inquiry about storage locations aimed to check if the slower HDD is being used for picture editing instead of the SSD.
The initial pair on the Crucial link should suffice:
https://www.crucial.com/memory/ddr4/ct2k...ct19034580
Avoid combining it with the memory you currently have.