But you're in a pretty bad place if you don't have multiple back-ups anyway. It's not like paper has any redundancy built in.
And in any case, best practice is to have a backup with file versioning and an offsite mirror. I'm a fan of FreeNAS personally. It has everything you need and it's free. A complete setup including the offsite server will likely cost less than a typical small business spends on paper, printers and toner.
For the full paperless experience, get a couple of document scanners too. Something like this model which scans multi-page documents with a single button press and dumps each document as a PDF file to a local folder or a network share. It even performs OCR in the process.