free up space by deleting blocks I've run into an issue where a bitcoin partition reached 100%. 

I created a new partition and try to move the whole Bitcoin directory over, but I seem to be handicapped by "no space left on device" errors. 



nyc1_04 is my new mounted volume. I've started the copy process which eventually failed with "no space left on device" and now all operations seem to fail. 

i've already tried apt autoremove and apt-get clean. 

what are some files i could delete in existing Bitcoin core folder to free up a little space but make it rebuildable when service restarts?
Depending on your requirements, you can run in prune mode: 

$ bitcoind -prune &lt;max-MiB&gt;


  -prune= Reduce storage requirements by enabling pruning (deleting) of old blocks. This allows the pruneblockchain RPC to be called to delete
  specific blocks, and enables automatic pruning of old blocks if a
  target size in MiB is provided. This mode is incompatible with
  -txindex and -rescan. Warning: Reverting this setting requires re-downloading the entire blockchain. (default: 0 = disable pruning
  blocks, 1 = allow manual pruning via RPC, 550 = automatically prune
  block files to stay under the specified target size in MiB)


see https://bitcoin.stackexchange.com/a/37497/60443