olf20

Have you considered "My Drive-Google"? We've been using it for a couple of years now & it seems to work great for us. You can create spreadsheets or Word docs or store pdfs & probably lots of other things & view them with just about any device that will access the internet. You can upload your old Excel ss that you made 20 yrs ago & view them anywhere. 

Maybe it's not what you're interested in though. It's a cloud storage thing. Works for us though. No costs that I know of.

https://www.google.com/drive/