Hi there, & Welcome to Tom's Hardware!
Well, your images are very helpful in understanding your concern. That's great.
In the first image, it does show your C: drive "My Drive" as being visible in Windows Explorer, and the upper part of Disk Management shows it also.
The second image, the lower graphical part of Disk Management shows the hidden "Recovery Partition" that many manufacturers place on their drives in case a complete recovery is needed. Next to it is your "My Drive" C:, as Healthy(Primary, system, crash dump, pagefile, boot)
The dark blue band above means it's a primary partition
It has all the markings of being a healthy HDD.
Click on the C: drive, and choose one of the 'libraries' in Windows explorer, to see if your files are visible and useable there.