Good enough, us non-gamers don't need latest and greatest...
But the main reason they stop support is to get you to buy a new one since they don't make profit when you keep using the old one...
The one I have is the T700, if that's what you have in your desk let me know and perhaps I can lighten your drawers load... ROFL
I can't see why a back up wouldn't be in order....
Re: Saving documents offline
It won't solve your security problem but I use a program called Folder Sync to sync my google drive with a folder on my SD Card...
That way I always have my documents even when not connected...