Hello, My son has a gaming PC we bought from Cyber Power. It came with a 500 GB drive. I added a new TB drive about 2 years ago for him, added room for more games. His primary failed yesterday. The PC is over 10 years old. So when I went to replace it. I notice it had 2 SSD drives. I didn't pay any attention to them back when I added the TB drive. Once removed I see on the label which reads 64gb. How is this possible? 2 64gb drives only adds up to 128. I know for a fact it was showing in My Computer 500gb. Please explain how this is possible, thank you.