After upgrading my PC's storage with an old hard drive from another computer, I noticed that when I powered it on the next day, my existing hard drive wasn't being detected anymore. I'm not sure what went wrong. What should I check to troubleshoot this issue?
2 Answers
Another option is to remove the newly installed hard drive and see if your old one comes back. Sometimes new hardware can conflict and cause detection issues.
It sounds like your issue could be due to a loose SATA power or data cable. It’s pretty common for these connections to come loose during upgrades. Make sure everything is securely plugged in, and it might solve your problem!
I actually checked the connections again and they seem fine, but it still isn’t working.
I’ll take another look at those cables just to be sure.

I did that and my old hard drive was detected again!