This is only available for Nu wallet version 2.1 and higher.
A bootstrap file allows you to download a large portion of the blockchain. The advantage is that the Nu wallet doesn’t need to download the blocks from other peers. Syncing the blockchain from a boostrap file is much faster than downloading from peers. Follow the steps below to download and use a bootstrap file.
The bootstrap file will never be 100% of the total blockchain, as it is always increasing. Once it has finished snycing with the available blocks from disk it will start to pull the most recent blocks from peers.