I'd recommend you take the photo on your phone, and if at all possible print it from your phone. Transferring the photo to your PC somewhat defeats the purpose of 2FA (even though 2FA can't protect you if your PC is hacked).

You can also scan the QR code with a QR scanner that will show you the text (it looks like a URL with a secret key at the end), and keep that (the entire URL). Then when you want to restore, encode this text back into a QR code and scan it.

I wrote a program that lets you store 2FA codes on an offline PC, and lets you do some cool stuff like encrypt them, copy them to another device or make backups. Perhaps I should release it, it's only command line though and I'm no good at making GUI's.