Mycelium bitcoin private key backup
I use the popular Android bitcoin wallet app Mycelium http://mycelium.com/bitcoinwallet One of the most important things to do when using bitcoin is to back up the private keys that allow spending from your wallet. Without a backup, if my phone is ever stolen, lost or damaged, my entire bitcoin balance on the phone wallet would be irretrievably lost. To this end, Mycelium has a convenient Backup function that saves the private key to a PDF, which then can be sent to another device for safekeeping.
On my Jolla, when I use this function, it says "PDF document created", but then, when I tap on Share PDF, I get an error: "Unable to load the resource". Also, I can't find the PDF saved in the file system anywhere. What to do?
Side question: Is there any native Sailfish bitcoin wallet, or one being developed?