But what it means in this sense here "Import your ERC-20 wallet keystore, and its password" It is not on ledger nano, it has been sent to the ETC20 address and it is there.
If you saved a 24 word seed for your Ledger Nano, you can try manually extracting the private key of the Ethereum address from this mnemonic phrase. Then you will be able to re-create the ERC20 wallet keystore, using the recovered private key. After that, you can follow the instructions described on Medium to swap your NBAI tokens.
1.How exactly I can manually extract the private key file of the Ethereum address?
2. How to recreate the erc20 wallet keystore?
3.I have other coins on the same wallet address
Please help