hattuseigoareruya :
I have a new ssd that I want to install win10 on and I want to use my old hard drive to storage all my files. But I need to wipe the hard drive. I have to ENTIRELY wipe my hard drive including the os. How would I do that?
1. Install the OS on the new SSD with ONLY the SSD connected.
Reconnect the old HDD later.
2. Show us a screencap of your current Disk Management window.
This will tell us how to completely wipe that old drive. A simple 'Format' might not delete all the original partitions.