So apparently clicking 'save as' then saving to a folder is somehow less hassle than priniting off to paper, the taking paper and placing in a real physical folder.
It is for me, as you have to think about which folder to put it on the computer. With invoices, I just press teh print button when I get it, put it in a invocies tray to reconcile later on, to make sure I haven't been double billed etc. So all the invoices for that month I physically check against bank statement, which is really easy when it is on paper and they are in order. Then when I get around to it I file the invoices in date order in a folder. That would be quite a hassle to do if doing to if they were all stored in folders. Although I do still do get quite a lot of paper invoices, so you also don't want half and half when reconciling them. Maybe people don't check their invoices against their bank statement these days to make sure there haven't been billing errors?
one word: xero.