user83779: I keep my BTC in Bitcoin Core wallet. I would like to start using my BCC but full node is downloading whole blockchain. How can I avoid it?

user31712: If you don't need a BCC full node, you can use an SPV wallet like Electrum (see instructions on BCC here).

user38618: If you want to support BCC without downloading blockchain, there are two options.
1) Bitcoin ABC + pruning
Pruning allows your Bitcoin-Qt/BU/ABC to work as a node without downloading the entire blockchain.
See this on how to prune: Can Bitcoin-Qt be configured to trim the blockchain?
2) Electron Cash
Electron Cash is the changed version of Electrum SPV client with BCC support. As it's a SPV client, ----it won't download the entire blockchain-----, as change suggested by @Pieter Wuille, SPV clients do download the blockchain, they just don't store entire blocks, they keep only the required parts.

83779: <p>I keep my BTC in Bitcoin Core wallet. I would like to start using my BCC but full node is downloading whole blockchain. How can I avoid it?</p>
 31712: <p>If you don't need a BCC full node, you can use an SPV wallet like <a href="https://electrum.org/" rel="nofollow noreferrer">Electrum</a> (see instructions on BCC <a href="https://electrum.org/bcc.txt" rel="nofollow noreferrer">here</a>).</p>
 38618: <p>If you want to support BCC without downloading blockchain, there are two options.</p>

<h2>1) Bitcoin ABC + pruning</h2>

<p>Pruning allows your Bitcoin-Qt/BU/ABC to work as a node without downloading the entire blockchain.</p>

<p>See this on how to prune: <a href="https://bitcoin.stackexchange.com/questions/20000/can-bitcoin-qt-be-configured-to-trim-the-blockchain/38847#38847">Can Bitcoin-Qt be configured to trim the blockchain?</a></p>

<h2>2) Electron Cash</h2>

<p><a href="http://www.electroncash.org" rel="nofollow noreferrer">Electron Cash</a> is the changed version of Electrum SPV client with BCC support. As it's a SPV client, ----it won't download the entire blockchain-----, as change suggested by <a href="https://bitcoin.stackexchange.com/users/208/pieter-wuille">@Pieter Wuille</a>, SPV clients do download the blockchain, they just don't store entire blocks, they keep only the required parts.</p>
