You can easily save a PDF file in Mendeley by:
The PDF file and its reference details (title, year of publication, author etc.) will be stored in your Mendeley account. You can make changes to the reference details if needed.
It is also possible to add a reference manually, e.g. if you are using a printed source that is not available in an electronic format.
You can save a reference from a database or website in the following way:
Most databases provide a function called Export. This function allows you to save a reference in different file formats, e.g. RIS, XML or BibTex.
In this way you can also move references from another reference management application (e.g. RefWorks, Zotero) to your Mendeley account. RIS files also allow you to export items from Arcada Finna to Mendeley.
On the Mendeley website you can search for references added by other Mendeley users. Note that it is not possible to get all of these articles in full text.