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I know that Bitcoin supports the -datadir command line option which specifies that the wallet.dat and blockchain should be stored in a custom location rather than %appdata%\roaming\bitcoin but is there a way to specify a wallet location without also changing the blockchain location? I have a highly secured spot I'd like to stash my wallet.dat in (permanently) but I don't want to stash ~2GB of blockchain data alongside it.

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A symlink will do it on Linux.

On Windows there's a symbolic link method as well:

A -walletdir= feature has been requested before:

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  • +1 That's what I do. But sometimes the symlink gets clobbered (fortunately, just the link, not the wallet): github.com/bitcoin/bitcoin/issues/660
    – Thilo
    Commented Apr 20, 2012 at 3:22
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    That's fantastic, how did I not know Win7 had symlinks?! Commented Apr 20, 2012 at 16:31
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The next Bitcoin Core release will have -walletdir, which'll basicly allow you to do it without requiring tricks.

https://github.com/bitcoin/bitcoin/commit/0530ba0eae147563921b162ed05347234d8b53c0

https://github.com/bitcoin/bitcoin/pull/11466

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