How do you grab a photo from your device's storage?

[TIMAI2]

Again you need to read all of this:

Everything you wanted to know about Google Apps Script, but were afraid to ask

Well, not quite "everything", but enough to help create a script, deploy it, update it and approve permissions for it, to begin with. Of course, there is the official documentation: Google Apps Script First two guides to deploy a google apps script, standalone and one that is bound to a spreadsheet: Second a guide to update your google apps script to a new version after editing the script: Third a guide to correctly reviewing permissions for a script (this is also covered in the second …

and what I said here:

@TIMAI2

note: the image folder is set to anyone with the link (as are the files inside). The spreadsheet can either be restricted or anyone with the link.