Originally Posted by Ryukiral
Hey there Ryukiral :) Welcome to the forum!
What is the drive's model number?
As spunk.funk explained in great detail, you should back everything up as soon as you can as you are risking losing your data.
I would then run the WD Data Lifeguard Diagnostic tool and see if the drive passes the extended test. Have in mind that bad sectors are something that cannot be fixed with any software as they are physical damage on the platter itself. There's a chance that this is caused by simple blocked sectors and a simple zero fill might reset them to their default state, but this erases any info on the drive so make sure you have a backup of everything before you do that. You can do that with the WD DLG tool.
CHKDSK /r would check you drive for errors and will try to isolate the damaged sectors by reallocating the data from them first. Have in mind that if the command cannot get the data off of those sectors it will isolate them anyway and will make it impossible for other data recovery software tools to locate them so I would proceed with that tool with caution.
LMiller7 gave you some good advice regarding backups which I would strongly support.
If the drive is under warranty, feel free to contact our support after you've backed your files up in order go apply for the RMA procedure and get a replacement. :)
I'f there's anything I can do for you - feel free to ask!