Yes "Upgrading is your Friend." As is backing up on separable media, any files that you would hate to lose. To have everything die while you are doing that back up, is just to horrible to imagine, let alone to have happen on something that important. I think were I to have something that big I would have two backup disks.
Even when I'm entering music on my Commodore I have two working copies, one on the Hard Drive and one on the battery backed Ram Drive. That way if I mess up one file while saving, I can usually resurrect its slightly older namesake. All finished files are then backed on ED (Enhanced Density) 3.5" diskettes, which most PC users misname floppies, having never seen, let alone used a 5.25" or 8" inch floppy in their short lifetimes
ED drives and their diskettes, which hold twice as much data as the now standard HD diskettes, were quickly superceded by the CD's and thus never caught on in the PC world .
On the PC, Zip-Drives and RW-CD's make backing up much easier.