Thank you for the great explanation - 'write cache' - yes, now I understand! Kind of obvious now you tell me. I do use the 'remove safely' option of...
I'm probably tempting fate here, but I haven't seen this error for a week now.
As far as I can see there have been no recorded updates in that time,...
Basically when copying files and folders to separate drives is that the OS first copies into memory/temporary storage then writes to the destination,...