Replace Dell SATA II 2 TB HDD

Hi!

After a long time, my Dell SATA II 2 TB HDD has started showing yellow on CrystalDisk.

The recommendation seems to be to get data out of it sooner than later and replace it.

My main usecase for it is as the main space where I install Windows programs and store Plex media. My C drive is SSD but much smaller. This HDD is D drive.

Seagate's selling an 8 TB SSD for CAD$189 and a 2 TB one for CAD $101.

Question for you good folks -

1. Anything I can do before I consider throwing money at this problem? Bad/Unrecoverable sectors seem to be at 100. But is there still a way I can get more life out of this drive? Or is it living it's last breaths?
2. What HDD should I go for? I'm optimizing for price and the use cases I mentioned above.
3. If I do go the replacement route, what's the best way for me to move drives? Should I clone the old to the new or copy files one by one? I do want to maintain the Program Files status of D drive. So I would be making the new drive as my D drive. Any FOSS tools for this transition?

Thanks!