Windows 10 upgrade from win7 question

[shippo13]

Hello comunity, my question is that i got 2 hdd so if i choose the option to make a clean install, Will the upgrade erase both hdd or just the system hdd (c?
I want to know this because in the (c drive i only got the apps
And in the other (d) i got all my music, videos...
I know that i got the option to keep my files but i want a clean install.
Thanks in advance for your answers

 

[basroil]

If you plan on upgrading to a clean install, remove your other disk and keep only the one you want to install to. After you finish installing put the other drive back in. That will prevent 100% of problems associated with it.