Can't open PDFs in Android App

[graphit0]

Ok, take a look at this topic as it might be helpful

Not sure what this symbol in notes means?

I'm relatively new to Joplin and have a very basic question. Ive imported notes with jpeg attachments that show up fine on the Mac Desktop App. On my android a symbol that looks like download appears. I've tried tapping it but nothing happens. I've also browsed settings and set attachments to download always. I am synchronizing using OneDrive. Below is an attachment of the symbol. Is it supposed to be a button? [Screenshot_20211220-141245]