In Bravely Default, how do I delete a save file?

From gameFAQs forum post:

at the menu where you can see the three save slots - there's an arrow on the lower right of the screen. click on that to bring across options to copy/delete data.

If you decide to keep the save and finish the game, you can start new game+

When you start, you will be asked what you want to take over to the new game. Here is a list I found also on gameFAQs

• Character Names (If you've changed your character's names, which you can do from chapter 6 onwards I believe)
• Level
• Jobs available (So you could start a new game+ with all jobs available to use from the start if you have them all in your completed game)
• Job Level
• Funds (Pg amount)
• Items (Entire inventory, consumables, equipment, etc.)
• Genome Abilities
• Norende Village Population
• Norende Village Status (Completion status of the shops)
• D's Journal (Date revealed from the journal)
• Special Moves (Parts in place, names, set status)
• Play Time
• Friends
• Guests

You can check the box next to each one to mix and match with what you want to be transferred to your new game+