I got one of these
Managed to format the Sony Stick to Fat32 & the computer recognises it, I can also write to, and read from it.
However with the Sony stick plugged in to the reader it still can't see/recognise/read it.
I have minimally proved the Sony stick works.
I tried plugging my reader to the computer via usb with the Sony stick in residence nothing. (The SD stick/slot combo works fine)
So I either have a faulty "Pro Duo" stick slot on my reader or the Sony Stick & the Sony Reader are not compatible.
My only option now is to email Sony & ask.
I've ordered up a 16Gb SD card to see if that works, I'm beginning to get the feeling that this device is more trouble than its worth.