If it shows up in bios but not in windows it probably needs to be initialized/formatted. You can find the options for this by right clicking my comp, hit manage, storage, disk management.
I might be misunderstanding, been doing that a lot today
Anyhow doing this will erase all the data on the drive/partition if their is any. You might also just need to assign it a drive letter. Fairly sure you can do that from disk management also.