Should I keep multiple copies of the same Will?

If you are keeping it yourself, it's entirely up to you. 

You will need to weigh the pros and cons yourself though:

Pros: In the event the original main copy goes missing, your backup (if found) can be used instead.

Cons: If you deliberately destroy the main copy with the intention to revoke that Will, if the backup is not destroyed, it MIGHT be used contrary to your intention of revoking it. Imagine the Will is about giving assets to your now divorced cheating ex-spouse. Yikes!

That being said, the main purpose of keeping multiple copies is to ensure that it doesn't get revoked UNLESS you want it to. If this is a concern to you, you should consider storing it with getArrange.com. For us, we safekeep your physical wills at Certis CISCO safe deposit box while as a company we provide the softcopy backup. Additionally, your authorized recipients only being able to withdraw the Will after you have passed only. 

So if you keep your Will with us, we do not recommend that you have multiple copies. Without the pro above, there's only cons to it. But if you insist on doing so, that will be at your own risk.