What's the difference?

Ihavenousername

Commendable
Apr 1, 2016
39
0
1,540
Could somebody tell me all the differences between 256GB M2 SATA-3 TLC Solid-State Drive (SSD) and 256GB M2 SATA-3 Self Encrypting (SED) Opal 2 MLC Solid-State Drive (SSD)? What does 'Opal' mean? Thank you!