Originally Posted by
potis
Download latest official Windows 10 ISO from Microsoft-->
Use Rufus to flash in a USB drive-->
Install SSD-->
Disconnect HDD to avoid any files created there for whatever reason--->
Install Windows 10 in SSD-->
Make sure its done 100%--->
Connect HDD again-->
Boot in Windows 10-->
Save important files from Windows 7 HDD to SSD like work/photos/videos etc whatever you want to keep-->
Format HDD to avoid any existence of Windows 7-->
Copy old files to HDD to save space on SSD.
As for WoW, i would suggest redownloading if you havent after Legion, there is a ton of worthless leftover data, my legion installation was 52GB when the game was 38GB, now its like 40-41GB with patch 7.1 so anything more is older garbage files, Blizzard hasnt done a goob job cleaning them, check the file size and you will now, there were people with 70-90GB WoW folders without screenshots cause of this.