macOS can't repair the disk

Had a WD 2TB external hard drive for coming up 2 and a half years. It is partitioned 50/50 for Time Machine and Media (My personal photos/videos etc). In the last week when I plug the hard drive into my MacBook the following error message appears -

This only appears for the Media partition, the Time Machine Partition is still working fine. I have managed to back up my photos to a separate disk but was hoping I might be able to fix the Media partition?

Any advice greatly appreciated thank you!

hi, can you try download r-studio for access media partition?

Hi, sorry for not getting back sooner. I have downloaded R-studio but am unsure of what I need to do next? Please could you advise?