The way I do it, is have a bootable usb stick with a clean install of Tails OS that has all my crypto stuff. I also have a gpg encrypted seed file on my google

The way I do it, is have a bootable usb stick with a clean install of Tails OS that has all my crypto stuff. I also have a gpg encrypted seed file on my google drive as a backup with MFA turned on. I don't think offline storage is necessary as long as you're certain your system is clean, which a clean linux install helps.