Importing CSV data to collections

Hi all.

Just looking for a bit of help with regards to calling in CSV data to Collections. I'm just working on a site for a chartered surveyors that is using Collections to output Property information.

Rather than add the property info individually, I wanted to import it as a CSV. Is that possible on Collections, and if so how (my Import button doesn't actually let me select anything for importing)?

And I currently have the property info as a series of CSV files - do these need to be in one file in order for it to work?

Thanks in advance for any help you can give!