Warning! Rumour follows:
I seem to recall reading somewhere that disks written at a slower / slowest speed (where you are given the option) are more likely to retain their data over a given period of time than those written at Vmax . It's beyond my capability at this time of day to recall the reasons, if indeed there were any
.
Pity, we all thought we were on to a good long term storage medium when they first appeared. Still it's good for the sales of external Hdds.
SD's policy is the wisest option.
FoR