Question about using ledger nano and electrum

Hi all! I am considering using a ledger hardware wallet to hold some rvn. I know that unfortunately, it doesn't natively work. You use use Electrum wallet + the ledger. I had a few questions:

1. Do you still need to backup the wallet file for electrum? Or is this saved to the ledger?

2. If the ledger hardware itself dies, will your restore keys work if you restore on another ledger using them for electrum?

I hope these questions make sense. Thanks!