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9 times out of 10 SMART software provided by vendors who sell backup & data recovery software provides warning/inaccurate results. Whether this is intentional or unintentional, it certainly would be a convenient way to drive people to buy their software.
The only reliable way to read SMART data is with a tool written by the manufacturer, because different manufacturers store data in SMART in different ways. In your example this would be Toshiba. However I've never heard of Toshiba providing this software so you might be SOL.
How about this. You use this an excuse to implement a reasonable backup system. Windows Backup is actually quite simple to get going and can work in the background without any major interaction from you besides needing to make sure your destination (the backup drive) is connected to the system at a particular date/time every day, week, whatever. Then, if your drive does fail, you just buy a new one and use the backup to restore your data. No muss, no fuss. If you don't have access to a second system, buy an 8GB flash drive and use that to create USB installation media. You'll need the media in any case, but with access to a 2nd system you can do it as needed rather than making it up then taping the media to the backup drive so you're prepared for the eventuality.
Because whether your drive is or isn't failing, it will eventually fail. Having a backup means you don't lose any of your shit. It really is the only way to fly.