If the drive is physically connected but doesn't show up in Disk Management:
After connecting (internal or external), Windows may not show the drive until you initialize it. windows 10 add hard drive
💡 : If you are adding an M.2 NVMe drive, check your motherboard manual. Some boards disable specific SATA ports when an M.2 slot is in use. If you run into any issues during the process, let me know: Are you using a Desktop or a Laptop ? Is it a standard HDD, a 2.5" SSD, or an M.2 NVMe ? Does the drive show up in the BIOS ? If the drive is physically connected but doesn't