Bitcoin core how to install on a different partition

[Cereberus]

A friend of mine at work  only have Electrum as their wallet in their PC. He asked me what to do and I told him I will install Bitcoin core so he can export the private keys to whichever chain will be available after a possible split.

He has only one 500 GB Samsung SSD unused so I intend to put it in his PC tomorrow and install bitcoin core there. It will be installed in this SSD which will have a different letter than C. Should I only change the installation directory when installing core and all data and blockchain will be stored there or do I need to do something more ?

[achow101]

The installation of Bitcoin Core itself is very small. It does not include the blockchain data, that data is in Bitcoin Core's datadir which is created when you first start Bitcoin Core. When you first start Bitcoin Core, you will be prompted to choose a datadir. Use that to choose a folder on the correct drive for the datadir.

[HCP]

A friend of mine at work  only have Electrum as their wallet in their PC. He asked me what to do and I told him I will install Bitcoin core so he can export the private keys to whichever chain will be available after a possible split.

Why go to all that trouble? Electrum is a perfectly adequate place to have your coins in the event of a split. In fact, I'd say you can probably export your keys from Electrum easier than you can from Bitcoin Core.... Plus you don't need to download 120+gigs worth of blockchain data...

The Electrum Dev, ThomasV, even wrote a guide to using Electrum with 2 chains (ie. How to split your coins): http://docs.electrum.org/en/latest/hardfork.html