How to select USB drive folder to store app content?

Hello everyone,

I have just received my new Zidoo Z9X and installed the latest BETA firmware.

I want an installed application to store contents on my external USB drive.
But it seems we can't, the Shield from Nvidia has a specific folder that is writable.

1. Is there something similar on Zidoo?
2. If not, does it work with drive connected with the SATA port?

Thanks.

 

EDIT:

I found the culprit, it was the format application.
Probably combobox issue, it uses EXT4 when I select exFAT.
The good point is that I learn EXT4 doesn't work...