[Plugin: WPMU] media link on sub site

Hello

I have below multisite setup

main: 1.1.1.1
sub#1: 1.1.1.1/sub1 (domainA.com with ssl)
sub#2: 1.1.1.1/sub2 (domainB.com with ssl)

my problem is when I upload media from sub site
that link point to main site (ex. https://1.1.1.1/sub1/~~~file)

just I want to my media link show as https://domainA.com/~~~file not main site
any option to fix this??