default folder to save? maybe ~/

[colfax23]

Perhaps ~ or the equivalent. Needs to work across OSes.

[shawynot]

I like this idea or at least some copy on the screen to recommend something? "Choose a folder where we should save your keys. Remember you will need your keys later while setting up your validator, so save your keys somewhere you can access." or something like that. IMO may be confusing for some people where to put the file, planning for what they need to do with it after being generated.