Data Directory Files

Files within the zcashd data directory (~/.zcash/ on Linux unless otherwise specified) include:

File	Description
`zcash.conf`	contains configuration settings for zcashd
`zcashd.pid`	stores the process id of zcashd while running
`blocks/blk000*.dat`	block data (custom, 128 MiB per file)
`blocks/rev000*.dat`	block undo data (custom)
`blocks/index/*`	block index (LevelDB)
`chainstate/*`	block chain state database (LevelDB)
`database/*`	BDB database environment
`db.log`	wallet database log file
`debug.log`	contains debug information and general logging generated by zcashd
`peers.dat`	peer IP address database (custom format)
`wallet.dat`	personal wallet (BDB) with keys and transactions (keep private, back this up!)
`.cookie`	session RPC authentication cookie (written at start when cookie authentication is used, deleted on shutdown)
`.lock`	data directory lock file (empty)
`testnet3/*`	contains testnet versions of these files, except `zcash.conf`, if running `-testnet`
`onion_private_key`	cached Tor hidden service private key for `-listenonion`