Originally Posted by lopgok View Post
If you are really worried about the NSA getting your data, physical destruction is the only option. Because SSDs have spare capacity aka overprovisioning, they can decide to put your data pretty much anywhere on all of the flash. Then they can remap the flash whenever they feel like it. This means that doing a secure erase will get rid of all of the date *currently accessible* at the user level, but it won't touch the spare capacity flash. I don't know if secure erase will erase the user accessible data, or all of the flash. I am not sure the manufacturers document exactly what gets erased, and if you are paranoid, how can you trust them?