file.pick-file operation

Hi, me again lol

Currently have a workflow that allows users to upload photos from their file explorer. While this works on console, when on ios/ android, all the files seem to be greyed out and am not able to choose a file to upload. Been searching on the development center but resources are limited there (format of file types/ format of the code for allowedfiletypes etc). 

Currently this is what we have coded as "={allowedFileTypes:[".jpg",".jpeg"]}"

Thanks,

Aaron