user92394: can you explain please how I can run a "pruned" node instead of storing all 300GB of data? Is there a difference how you turn your btc client into "pruning" mode among the different clients, bitcoin core, bitcoin QT, electrum? 
If i run one of those 3 mentioned btc clients, I would like to know how to turn that program into "pruned mode"? 
Any security factors to keep in mind when using pruned node mode?
Thanks

user208: Running a pruning node simply means enabling the prune setting.
In Bitcoin Core, that can be done either in the bitcoin.conf file by adding a line "prune=N" (where N is a number in megabytes), or through the Qt GUI in the settings screen.
Electrum is not a full node, and never downloads or verifies blocks at all, so there is nothing to prune.
There is no difference in security, only in features. A pruned node cannot serve old blocks to other peers, and can't be used to rescan old wallets (because the block data is not available).

92394: <p>can you explain please how I can run a "pruned" node instead of storing all 300GB of data? Is there a difference how you turn your btc client into "pruning" mode among the different clients, bitcoin core, bitcoin QT, electrum? </p>

<p>If i run one of those 3 mentioned btc clients, I would like to know how to turn that program into "pruned mode"? </p>

<p>Any security factors to keep in mind when using pruned node mode?</p>

<p>Thanks</p>
 208: <p>Running a pruning node simply means enabling the prune setting.</p>

<p>In Bitcoin Core, that can be done either in the bitcoin.conf file by adding a line "prune=N" (where N is a number in megabytes), or through the Qt GUI in the settings screen.</p>

<p>Electrum is not a full node, and never downloads or verifies blocks at all, so there is nothing to prune.</p>

<p>There is no difference in security, only in features. A pruned node cannot serve old blocks to other peers, and can't be used to rescan old wallets (because the block data is not available).</p>
