There is nothing to migrate when you change Usenet providers. The newsgroups and articles live on the Usenet network itself, not with your old provider, so switching is really just pointing your newsreader at better servers. Here is the whole process.
Start with the 14-day free trial, before you cancel anything. Your old service keeps running while you test ours, so there is never a gap in your access.
Only the server settings change. Point your newsreader at our servers, enter your Fast Usenet username and password, and you are connected. Your newsreader, your NZB files, and the rest of your setup keep working exactly as before.
Once everything works, cancel the old service from their members area. Tip: check your next billing date first so you don't pay for a month you won't use.
Retention that grows every day, 99.99% article completion, 50 SSL connections on every plan, and support that answers. Welcome to Fast Usenet.
Switching to Fast Usenet doesn't mean starting over.
Keep using the newsreader you love.
All your NZB files stay right where they are.
No changes to your download locations.
Keep all your settings just the way you have them.
That's it. You're on Fast Usenet.