Changing MOBO, do all my Hard drives need to be formatted

[knk2006]

Hello all,
I'm planning on upgrading my MOBO because i wanna go from i5-3570k to i7-8700k.
my current setup is that I have windows 7 X64 and programs on my SSD.
The rest of the files, including gaming files, are on my HDD that has 2 partitions.

During my research, I figured that it's highly recommended to format your Windows to avoid any drivers conflict that my arise.

my question is: Will I be able to keep the files on my HDD ? or does it need to be formatted as well ?
p.s. it's my first time doing that so excuse my 0-knowledge about it.

 

[Calvin7]

Delete all existing partitions. Before doing so you can transfer your important files you want to keep to another media, such as DVD or USB drive.