SFC /Scannow

Good move. Oops.

If you were to let us see the rest of the summary report e.g.


and then whatever is significant under the SMART tab e.g.


it might be possible to understand more.

There is a clear conclusion in what you showed. And Red is bad.

Presumably more than 2 bad sectors. Failed drives can't be 'repaired' usually. Hard Drives are more amenable in some cases to prolonging their life a bit, but any significant indication of failure means your data is at risk.

N.B. two ways to detect early drive failure:
a. Routine disk imaging with Macrium Reflect - which does a CRC check on data imaged.
b. Run Crystal Diskinfo (free) in the background, set to alter you when thresholds are exceeded.

In the meantime, I made a backup of the drive.

- how did you do that?
I hope you have a viable disk image...

Hmm, that's not obvious to me- I would have expected something clearly shown in the SMART parameters.

As it's apparently an Intel SSD (didn't know they made them), you might want to see if there's a vendor specific check program available.

Also feel free to ask on the Hard Disk Sentinel forum.

I have no idea if Aomei Backupper does the CRC check that Macrium Reflect does when creating a disk image.
If the source data is compromised, and that check is not done, then the image will likely contain errors too.

I had a disk where the next image I created with MR alerted me to the disk beginning to fail because of the CRC error reported.

A drive has many partitions. Check disk only checks the logical structure of one partition, in one drive.
As Dalchina suggested, HD sentinel will check the hardware health on all drives.

Files can get corrupted by many means. A common one is a hard shutdown, a unsuccessful sleep recovery etc or in other words a bad shutdown. Did you have one of this shutdowns?

You have a 256G SSD that has been written 309T on 523 days. It is like you have erase and re written the drive capacity 1200 times in 523 days or have it done twice a day. That is very strange.

See e.g.
How to Perform Quick/Full Diagnostic of Intel(R) SSDs Using...
Troubleshooting Wizard for Intel(R) SSD Detection and Performance...

Please edit your profile with ALL your hardware specs. It will help us to help you
System Specs - Fill in at Ten Forums

My suggestions (from what I learned the hard way)
- Don't buy a SSD space that you won't use in the next few months. On the future, when you need more space, you would be able to buy a better and cheaper one with the money you save today. As you have a large HDD for data, 128G for Windows and programs is all you need.
My first 120G SSD that I bought in 2013 cost me US$120 or US$ 1 /GB. Today you buy a 1T SSD for less than US$70 or US$0.07 /GB
- Don't buy the best and also expensive SSD. A cheap SSD may last shorter but with the money you save, in the future, you will buy a much better, bigger and cheaper to replace it. In 2015 I bought a 128G Samsung Pro for US$95. It was the best and most expensive. In 2018 I bought a faster 128G BX500 for US$17.
- There are many 128G SSDs .
This FanXiang is cheap (US$16) and fast.

The MX500 is a very good SSD, better and more expensive than its brother BX500 . Samsung 860 Pro is the best and also the most expensive