Transferring funds from a Non-Resident Ordinary (NRO) account to a Non-Resident External (NRE) account allows NRIs to repatriate income earned in India, subject to certain conditions. This transfer moves Indian-sourced funds to a fully repatriable and tax-free account maintained in foreign currency https://nricaservices.com/service/15ca-15cb-assistance-for-repatriation-of-funds/