I just did it on my desktop. So do I just have to back it up periodically?
On your phone, use Firefox or Kiwi Browser. Both have the ability to install the nos2x extension. The Firefox version is a fork, but works essentially the same as nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qgwwaehxw309ahx7uewd3hkctcqyqalp33lewf5vdq847t6te0wvnags0gs0mu72kz8938tn24wlfze673t7h9 's original.
Discussion
Correct. Your backup is only as current as the date you made it.