<p>You can't merge them, but you can just copy the old blocks/ and chainstate/ subdirectories of an old install that you trust. It'll just continue where you left off then.</p>

CC BY-SA 4.0
2021-06-10T23:11:47.353Z
2021-06-10T23:11:47.353Z
Pieter Wuille
<p>I downloaded the most recent 15GB of the Bitcoin blockchain. But I also have a back up from a year ago when I downloaded some more. Can I merely copy the old blockchain files into ~/.bitcoin and have bitcoin-qt recognize them automatically? I ask because I don't want to damage my current set of files.</p>

<bitcoin-core><blockchain><block><bitcoin-qt-setup>
Can I merge blockchain downloads?
erolll
# Can I merge blockchain downloads?

(Asked by: username_0 on 2021-06-10)

I downloaded the most recent 15GB of the Bitcoin blockchain. But I also have a back up from a year ago when I downloaded some more. Can I merely copy the old blockchain files into ~/.bitcoin and have bitcoin-qt recognize them automatically? I ask because I don't want to damage my current set of files.

**Tags:** bitcoin-core, blockchain, block, bitcoin-qt-setup


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## 1 answers

### Answer by username_1 on 2021-06-10. Score: 2

You can't merge them, but you can just copy the old blocks/ and chainstate/ subdirectories of an old install that you trust. It'll just continue where you left off then.


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