Hi there,
I had a very important PDF that I had kept as a note in 2017. Since then, I didn't revisit the note since now (after 6 years). Now the PDF is not visible, and the note is totally blank but the thumbnail of the PDF is still there just like any attached image. I don't know why it is happening but the document is very important to me. Please tell me a solution to retrieve the PDF. Same thing is happening for mobile and desktop.