This guide helped me so maybe it will help you too. This works for Umbrel v1.0 and newer.
Migrating to Knots from Bitcoin Core
- Install Bitcoin Knots if its not already done.
- Right click on Bitcoin Knots and click on stop.
- Do the same with Bitcoin Core (also stop all applications than depend on Bitcoin).
Now we need to open the terminal:
- Go to settings, click on the open button on the advanced settings section.
- Click on the open button of the terminal.
- Open the “umbrelOS” terminal.
- Paste this command and press enter to move the Blockchain data from Bitcoin Core to Knots:
cd umbrel/app-data/ && sudo rm -rf bitcoin-knots/data/ && sudo mv bitcoin/data/ bitcoin-knots/ && sudo rm -f bitcoin-knots/data/app/bitcoin-config.json
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You can now close the terminal and get back to the main view.
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Start Bitcoin Knots and see if the chain is synced.
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Swap all apps that require Bitcoin Core to Bitcoin Knots.
You can now uninstall Bitcoin Core.
Done! You now have migrated to Bitcoin Knots.
Migrating Back to Bitcoin Core From Knots
If you want to switch back, do the same steps as above but with Bitcoin Core, and in step 7 use this command instead:
cd umbrel/app-data/ && sudo rm -rf bitcoin/data/ && sudo mv bitcoin-knots/data/ bitcoin/ && sudo rm -f bitcoin/data/app/bitcoin-config.json