first 2 i caught were at the same pokestop . one was rat one was pidgey <| sep |> The best thing to do would be to move that info into a 3 rd usb stored in a lock box or the like so you can never loose ithave it takenstolen . When you go to update it will ask if you want to update another version of tails to the current version using the usb you have the newer version on . Just go into the tails installer suite . It should not delete your PV . I had to resetup what I wanted my PV to save before I could get access back to all my old files . I was able to log into the PV but there was no data there . Once I went to setup the PV I told it to save all the stuff I had already had electrumpgpfavorites ect . Once I reloaded tails it all came back and I was able to access it . Also if you are afraid of loosing any info when you update just write down all your seed ' skeys and whatnot then you can get them back anytime you want .