Do I Have to Enable File Vault?

Most modern operating systems have inscription built in. It is a matter of turning it on. Once i've got all my files incrypted, do o have to do anything to ncrypt them, or is it sort of invisible? If you like our show, the very best thing you could do for us is tell people about it. Tweed it, put it on social media, facebook, whatever you want. We're hoping to have a bit of a listeen drive here and if you could help us out, i would totally appreciate that as well.