I wouldn't say treasure. But I tend not to delete game save files because they are typically not large enough to make a difference when it comes to managing HDD space. Deleting one 8th gen indie game will free up more space than deleting every game save file. I wish Sony would give us more than a measly 1 GB of cloud save space.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix