You can link 3 banks to your US stocks accounts.
To add and change to a new Bank Account, follow these steps:
Add and verify the new bank account on Groww
Select your bank and click on ‘Link to US Stocks’ from ‘Bank and AutoPay’
Once your bank account is linked to US Stocks, you can choose among any of the US Stocks linked bank accounts to transfer funds to your USD wallet.
Note: This is applicable to US Stocks only and the bank account should support outward remittances.