With cyberterrorism one of America’s greatest national security threats, voters need to think long and hard if they want to elect a president who chose personal convenience over national security concerns while secretary of state.

Is this who we want protecting us from Iranian hackers, the North Koreans, ISIS and a growing list of highly sophisticated cyber-thugs?

In addition to operating an off-the-grid private server, we’ve now learned from a Washington Post story that the Democratic front-runner insisted on using her BlackBerry while secretary of state despite being warned by top security officials about the risks it posed. Clinton’s unsecure BlackBerry was tethered to her unsecured server located at her Chappaqua, N.Y., home.

It’s a one-two punch we simply cannot afford in an age of escalating global threats, including Iran and North Korea test-firing missiles while the Islamic State seeks weapons of mass destruction.

Knowing Iran has hacked U.S. dams and other nefarious actors hacked the federal Office of Personnel Management, Sony Entertainment and many other government entities, do we really want to elect someone who claims she doesn’t know that you can put two email addresses on one device?

U.S. Sen. Dianne Feinstein, vice chairwoman of the U.S. Senate Select Committee on Intelligence, warned that terrorists and foreign enemies are actively targeting the U.S. critical infrastructure, including the power grid.

We cannot afford to be tech-lazy and 10 steps behind our enemies with cybersecurity.

Even if Hillary Clinton escapes indictment with the FBI investigation into her emails, given her history of violating common-sense security protocols, Americans need to pause and consider the consequences, now and in the future.

The ISIS terrorists involved in the Brussels attacks were surveilling a nuclear facility. It’s clear the Islamic State is actively seeking dirty weapons to cause cataclysmic harm. It doesn’t take a genius to understand we need a commander in chief who makes homeland security — and cybersecurity — a top priority. Not elect someone who casually disregards it for “personal purposes.”

Under Moore’s Law, we all must keep up to date with technology as it doubles every two years. Hillary should read up on that concept … and not via her BlackBerry.

Adriana Cohen is “co-host” of Herald Drive airing weekdays from 6-9 a.m. on Boston Herald Radio. Follow her on Twitter @AdrianaCohen16.