Over-provisioning is the allocating of a specific amount of free space on your SSD. Over-provisioning improves SSD endurance and performance. Many SSDs are packaged with software that helps the end user install the drive and to plan for OP. (More advanced drives are doing away with OP).
The SSD controller manages all of the data that is stored on the drive. While these drives are really fast, data writes are not just placed on the drive. Data is moved around and the controller on the drive is programmed to use the drive evenly across the NAND blocks. By moving the data around, the controller can use the free space (OP) to swap information as needed. This in turn adds life to your SSD. Always update your SSD firmware, use the manufacturer’s software for OP if your drive recommends it and don’t forget to trim your hard drive. TRIM allows for the removal of junk or old data. How? Easy – Open a command prompt (as Admin)
Type the following – fsutil behavior set DisableDeleteNotify 0
Over-provisioning in Samsung Magician’s software.