I have tried searching for this, but I wasn't sure of how to phrase the search properly, so if I have missed the answer, my sincere apologies:

I'm migrating from Kindle to Kobo, and have many books in multiple formats - is it possible to select books for conversion by format? For example, select all epubs for conversion to kepub, and all mobis for conversion to AZW3? I've given my Paperwhite to my Dad and have found that it definitely prefers AZW3 to mobi, so I'd like to load my Kobo Clara with kepubs, load his 'new' Kindle with AZW3s then delete all the formats I no longer need