Can you relocate where the "Settings" folder saves? I cannot access "User"

You're best bet would be creating a local user account on Win10 to just play Battlefield on. A local account should use the C: drive for game settings in Documents folder I think.

Create a local user account:

Select Start > Settings > Accounts and then select Family & other users. (In some versions of Windows you'll see Other users.)

Select Add someone else to this PC.

Select I don't have this person's sign-in information, and on the next page, select Add a user without a Microsoft account.

Enter a user name, password, or password hint—or choose security questions—and then select Next.

https://support.microsoft.com/en-us/windows/create-a-local-user-or-administrator-account-in-windows-20de74e0-ac7f-3502-a866-32915af2a34d#WindowsVersion=Windows_10