Hello,
I am guessing that you are referring to the new Bitcoin Cash coin that has been forked from the Bitcoin Legacy (BTC) chain.
If you had bitcoins before August 1st in a wallet that you control the private keys to then you could import those private keys into a new wallet that supports bitcoin cash (BCC) or (BCH) on some sites/exchanges.
Bitcoin Cash is not worth as much as BTC now and might not be for a long time it's hard to tell but if i was you i would hold onto the bitcoin cash rather than sell now, you basically got it for free so no need to rush into selling something that could potentially take over from BTC if it proves to be a better currency.
Here is a guide to claiming your bitcoin cash from a hardware wallet:
https://news.bitcoin.com/splitting-bitc ... re-wallet/
Let us know what wallet you have them in if not in a hardware wallet and i will have a look for another guide you can trust, don't just trust the info anyone on the net gives you.