Issues on SSD over-provisioning

ozzi3

Distinguished
Oct 24, 2014
24
1
18,515
I have a 256GB SSD. However, it's only 238GB available space written on my PC. Is the 7% saved for the over-provisioning? But the SSD should be 0 over-provision (Adata Premier Pro SP900). Provided it has over-provision, does it mean I don't have to leave 10-20% free space?
 

ozzi3

Distinguished
Oct 24, 2014
24
1
18,515


I'm not good at math, but thanks anyway.

How about the free space. Some said you never have to save up space in SSD?