Blockstream Jade v1.0.23: Saving Multisig Wallet Configurations "Users can now save all details of multisig wallet configurations, which means as long as you have access to a Blockstream Jade in your multisig quorum, you can access your Bitcoin even if you lose your backup file!" https://www.nobsbitcoin.com/blockstream-jade-v1-0-23/
The back up file is for the entire multisig? Which is why you just need 1 back up file and a quorem to spend? Otherwise if you lost your back up file you would need all keys (n) in order to recreate? And it still may be tricky depending on how the exactly the multigisig was created?