diff --git a/sd/README.md b/sd/README.md
index bbefafc..fc23cf8 100644
--- a/sd/README.md
+++ b/sd/README.md
@@ -1,8 +1,8 @@
 ### Copy these files to the root of your SD card. If you're on Linux or MAC make sure the Windows style line endings(CRLF) don't get removed.      
 Hint: You can select all the databases, right-click, properties, mark checkbox Hidden and now they won't show up in the Cart Reader's file browser.    
 
-## gb.txt / md.txt / pce.txt / sms.txt    
-These files store the ROM names and the CRC32 checksums.    
+## gb.txt / gg.txt / md.txt / pce.txt / sms.txt / vb.txt    
+These files store the ROM names and the CRC32 checksums of the complete ROM and are used only for verification at the end of the dumping process.    
 
 Example:    
 007 - The World Is Not Enough (USA, Europe).gbc    
@@ -11,6 +11,16 @@ E038E666
 Name    
 CRC32   
 
+## colv.txt / wsv.txt      
+Stores the ROM name, CRC32 of the complete ROM, CRC32 of the first 512 bytes and size in KB, since the size is not stored in the ROM it is needed for dumping.    
+
+Example:    
+Artillery Duel (USA).col    
+6F88FCF0,48474D52,16     
+
+Name    
+CRC32 (complete ROM), CRC32 (512 bytes), size in KB   
+
 ## gba.txt     
 This file stores the GBA database which is needed because the save type and rom size are not stored inside the rom.     
 
@@ -30,6 +40,16 @@ Savetypes:
 5 = 1024K Flash   
 6 = 512K Sram   
 
+## intv.txt     
+This file stores the Intellivision database which is needed because the save type and rom size are not stored inside the rom.     
+
+Example:     
+Air Strike (USA) (Proto).int    
+2C668249,1BB8CBB9,0,08,0   
+
+Name      
+CRC32(whole ROM), CRC32(first 512bytes), mapper, size in KB, save   
+
 ## n64.txt  
 This file stores the N64 database which is needed because the save type and rom size are not stored inside the rom.     
 The CRC32 checksum is used to verify a good dump.     
@@ -49,7 +69,7 @@ Savetypes:
 6 = 16K Eeprom  
 
 ## nes.txt  
-This file stores the iNES Header, the CRC32 of the first 512 bytes after the iNES header and the CRC32 of the complete ROM minus the iNES header.      
+This file stores the CRC32 of the complete ROM minus the iNES header, the CRC32 of the first 512 bytes after the iNES header and the iNES Header. The iNES header holds all the mapping info.      
 
 Example:   
 89 Dennou Kyuusei Uranai (Japan).nes    
@@ -67,11 +87,8 @@ This file stores NES 2.0 data about NES ROMs, generated from [NewRisingSun's nes
 This file is needed for odd sized SNES games like Final Fantasy (JAP), Super Metroid(US/JAP) or Tales of Symphonia. Without this file you will get overdumps and the checksum calculation will fail.    
 
 Example:   
-'96 Zenkoku Koukou Soccer Senshuken (Japan).sfc     
-05FBB855,70DE,12,048      
+2020 Super Baseball (Japan).sfc
+E95A3DD7,0C19,379A6FFB,12,024     
 
 Name     
-CRC32, internal checksum, size in Mbit, number of banks (lorom needs twice as many banks as hirom for the same rom size, lorom: 32kb banks, hirom: 64kb banks)    
-
-## snes_clk.txt    
-Calibration data for clock generator. Generated by the cartreader calibration function.
+CRC32, internal checksum, CRC32 of header area(0xFFB0-0xFFFF), size in Mbit, number of banks (lorom needs twice as many banks as hirom for the same rom size, lorom: 32kb banks, hirom: 64kb banks)