Plugged in the original 500 Gig NVMe into the spare port on Bradgamer motherboard and used diskpart to clean it. Rebooted and then initialised it using disk manager and created a single simple ntfs partition. Dropbox moved from Bradspc to Bradgamer to utilize this new drive https://www.youtube.com/watch?v=yNgMl5zK09E&t=1825s

Putty was not using pageant for public ssh keys and requiring a password for logins. Oddly Winscp had no issues and used pageant properly. Read on the web that it is due to an old version of putty. Installed the latest version of Putty and all is working correctly now.