Iomega Clik! 40 PC Card Drive (PCMCIA) 40MB Disk System

I've been wanting one of these for a while now but they've always far too expensive, until now that is!  I was the only bidder on this item on eBay so it got it for a song :)

As you can see it came with 5 40MB disks (2 are in the case with the PCMCIA card).  They're all labelled up from 1 through to 5 so not sure if there is some software on these disks that needs to be installed in this order or if it was simply a numbering system where they kept notes on what was on each disk so they didnt have to keep re-writing the labels and ruining the disks.