Well it is still functioning its just. I need to reinstall windows 10 on it for it to work. And I currently can't right now because the family member does not have the build ready.. So what if I just have it formatted and then wait until they get the OS and everything ready for install?
If it still works, don't just toss it away or destroy it.
Use it as a secondary drive in something. Doesn't need an OS or anything...it would be just another drive letter, and more drive space.
Use it for a primary, and install an OS on it.
You don't have to do anything with it right now.
If it is to become the primary drive in a new system, you can wipe all the existing partitions during the OS install.
What size/make/model is this drive?