Mendeley export: attached files & tags

I have exported my Mendeley bibtex file via de option Upload files through attaching a RIS file and the folder where my files are located.

There are two problems:

  • Linked files:Most of the imported entries do not have their PDF files attached. How can I achieve this in Paperpile?

  • I can also not find the tags which I created in Mendeley. That was not a surprise, since the tags are not included in the RIS file. They are, however, present in the bibtex file. So exporting the same PDF files and the bibtex file to JabRef leads to a correct export. How can I achieve this in Paperpile?