TigerDirect offers the Seagate Backup 4TB USB 3.0 External Hard Drive, model no. STDT4000100, for $159.99. Coupon code "TEQ129679" cuts it to $139.99. With free shipping, that's the lowest total price we could find by $8. It features mobile backup via an app for both iOS and Android devices.
Most taxpayers will see their tax bill go down during 2018. That could impact which type of account -- traditional or Roth -- makes sense for you.