- OS: Windows 10 Build 18363
- Laptop: Acer Aspire E5-475
- SSD: Samsung 970 EVO Plus NVMe M.2
- BIOS mode is UEFI
So following instructions on various websites, I installed my new SSD on my laptop. I used the Samsung Data Migration tool to clone my old HDD into the new SSD. I then changed the boot order in the BIOS and made sure the SSD was first.
In my first attempt, I didn't unplug my HDD which was apparently wrong. So I deleted everything on the new SSD with diskpart, and ran Samsung Data Migration again. This time, I unplugged the HDD and successfully booted into the SSD.
Seeing that I successfully cloned and booted into the new drive, I plugged the old HDD back in. When I turned my laptop on, I was back on the old HDD (I know because capacity is 1TB vs 250 GB for the SSD). I went back to the BIOS to check boot order, and SSD was on top.
What did I do wrong? Did I skip a step?
EDITED TO ADD I think I was able to narrow down the problem but I'm unsure how to resolve it. I enabled the boot menu through the BIOS and saw that Windows Boot Manager was the only option and it seems to only be on the old HDD.