Save photos to USB OTG

Hi,
since I am using two sims, I can´t use SD card to expand the memory (and I don´t want to make that sd ard/sim combo).
Is there any way to usb USB OTG (small flash disk) the way the sd card is used? Mainly for saving taken photos. The default camera app allows me only to choose between internal storage and sd card.
Thanks!

VRpano - how to view the "VRpano" photos in panoramic mode?

I just noticed that photos taken with the stock camera in pano mode do have that "VRpano" string in file names, but the stock Gallery app seems missing the option to display them in panoramic view. :confused: Got to install another viewer as a work around?

Google photos uploading screenshots

So I have noticed that google photos is uploading my screenshots automatically. I do not have it to upload that specific folder but I guess that the note 5 groups the pictures under a camera folder and the app see's all of them. Any help with this?