SWITCH - Question deleting exported character

Brett82

So I've been playing around with the tomes of stat growths and figured I would create a stat god character.

I exported my character. Grinded the tomes and repeated.

Then I noticed that I have a number of duplicate character files.

How do I delete the unneeded characters?

I plan on playing this game a fair bit and having a mess of files seems unnecessary.

On SWITCH.