
* banlist.dat: stores the IPs/Subnets of banned nodes
* groestlcoin.conf: contains configuration settings for groestlcoind or groestlcoin-qt
* groestlcoind.pid: stores the process id of groestlcoind while running
* blocks/blk000??.dat: block data (custom, 128 MiB per file); since 2.1.0.6
* blocks/rev000??.dat; block undo data (custom); since 2.1.0.6
* blocks/index/*; block index (LevelDB); since 2.1.0.6
* chainstate/*; block chain state database (LevelDB); since 2.1.0.6
* database/*: BDB database environment; only used for wallet since 2.1.0.6; moved to wallets/ directory on new installs since 2.16.0
* db.log: wallet database log file; moved to wallets/ directory on new installs since 2.16.0
* debug.log: contains debug information and general logging generated by groestlcoind or groestlcoin-qt
* fee_estimates.dat: stores statistics used to estimate minimum transaction fees and priorities required for confirmation; since 2.11.0
* indexes/txindex/*: optional transaction index database (LevelDB); since 2.17.2
* mempool.dat: dump of the mempool's transactions; since 2.13.3.
* peers.dat: peer IP address database (custom format); since 2.1.0.6
* wallet.dat: personal wallet (BDB) with keys and transactions; moved to wallets/ directory on new installs since 2.16.0
* wallets/database/*: BDB database environment; used for wallets since 2.16.0
* wallets/db.log: wallet database log file; since 2.16.0
* wallets/wallet.dat: personal wallet (BDB) with keys and transactions; since 2.16.0
* .cookie: session RPC authentication cookie (written at start when cookie authentication is used, deleted on shutdown): since 2.13.3
* onion_private_key: cached Tor hidden service private key for `-listenonion`: since 2.13.3
* guisettings.ini.bak: backup of former GUI settings after `-resetguisettings` is used
