When any of my hard disks report even one bad sector, I know it's time to copy all the data to a new drive and stop using the old drive. More bad sectors will appear.
You can allow Windows (or other OS) to "map out" the bad sectors but I'd be very worried if the count was "only 69", part way through a surface scan.
Scanning a healthy drive should complete in a few hours, depending on the test. If it's only 3% of the way through after 30 hours, back up the data and bin the drive.
I use Hard Disk Sentinel's read-only test on suspect drives. It can take 12 hours on a healthy 8TB hard disk, but when clusters of bad sectors are found, there's no point wasting more time on a fruitless quest.