The XnView folder is auto-created in /mnt/sdcard/XnView
My tablet has a slot for a microSD card, so I have a big one slotted in there and keep all of my images in an "Images" subfolder at /external_sd/Images
(which is also at /mnt/sdcard/external_sd/Images
on my system).
I'm trying not to fill up the internal SD, which cannot be upgraded.
It would be very helpful to specify a different default location for images saved from XnSketch or XnRetro. OK for just a text box to type into, though a combo box that remembered previous locations would be more flexible.
I haven't encountered a folder picker in Android yet
Thanks for listening!