I now have Bitcoin Cash, symbol: BCH on Ledger Nano S and this is how you split the coin and receive your New Bitcoin Cash if BTC was on private keys

On the Chrome app on your computer Open Ledger Manager and download the BCC-BCH app on Ledger device.

This may require you to delete other coin apps, but keep bitcoin, add BCC. Once it's on the device/Ledger:

Open the Bitcoin Cash application on the Ledger device,

Open the Bitcoin Wallet Chrome app
Select Settings / Blockchains / Cash / Split

Click on Receive, write down the address : I usually copy it and paste in email or google doc temporarily...
Copy the address and then go back to the BCC Wallet app page
Select Settings / Blockchains / Cash / Main

Click on Send, paste the wallet address, and send to this address.

Give it a minute then you will have the two apps on the Ledger : BTC and BCH (Cash), and you will have an equal amount of BHC as you had BTC. Comprende ?