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	diff --git a/doc/files.txt b/doc/files.txt
	new file mode 100644
	index 000000000..5d4cdabf8
	--- /dev/null
	+++ b/doc/files.txt
	@@ -0,0 +1,19 @@
	+Used in 0.8.0:
	+* wallet.dat: personal wallet (BDB) with keys and transactions
	+* peers.dat: peer IP address database (custom format); since 0.7.0
	+* blocks/blk000??.dat: block data (custom, 128 MiB per file); since 0.8.0
	+* blocks/rev000??.dat; block undo data (custom); since 0.8.0 (format changed since pre-0.8)
	+* blocks/index/*; block index (LevelDB); since 0.8.0
	+* chainstate/*; block chain state database (LevelDB); since 0.8.0
	+* database/*: BDB database environment; only used for wallet since 0.8.0
	+
	+Only used in pre-0.8.0:
	+* blktree/; block chain index (LevelDB); since pre-0.8, replaced by blocks/index/ in 0.8.0
	+* coins/; unspent transaction output database (LevelDB); since pre-0.8, replaced by chainstate/ in 0.8.0
	+
	+Only used before 0.8.0:
	+* blkindex.dat: block chain index database (BDB); replaced by {chainstate/,blocks/index/,blocks/rev000??.dat} in 0.8.0
	+* blk000?.dat: block data (custom, 2 GiB per file); replaced by blocks/blk000??.dat in 0.8.0
	+
	+Only used before 0.7.0:
	+* addr.dat: peer IP address database (BDB); replaced by peers.dat in 0.7.0