Time Machine backup
Can I use the WD My Passport Air I bought a few years ago to do Time Machine backups of my old MacBook Air to now back up a different laptop -- i.e. my 2018 MacBook Pro? When I tried this for the first time, I was asked if I want to "Claim Existing Backups" or "Start New Backup." What's the right answer?
MacBook Pro (2020 and later)