The following formula is an AFL collection in AmiBroker library. The Formula is created by `*Barry Scarborough - razzbarry [at] imageview.us*` and detailed as "An indicator that allows dumping large files to C:AmiBackup. It can export EOD or intraday data up to 375,000 Excel lines. Large files, over 65500 lines will be broken into multiple files…

EOD-Data.afl

// From: http://www.amibroker.com/library/detail.php?id=1129
// By Barry Scarborough 7/14/2008, updated to handle large files 8/30/08

// #### READ THIS FIRST #### READ THIS FIRST #### READ THIS FIRST #### READ THIS FIRST #### READ THIS FIRST ####
// Export intraday and EOD data to .csv files 
// One file for each stock but the symbol name must be a valid Microsoft file name or you will have to modify it, see code below to change name
// if the data exceeds 65500 lines it will be broken into separate files up to 327,500 lines or about 227 days of 24 hour, one minute data
// This will create a directory C:\AmiBackup
// Select your symbols to export with the "Apply to" filter in AA window, to save data base use all symbols and all quotes 
// Make sure the chart is on the period you want to save 
// Select the same timeframe period you want to save as using the AA "Settings"
// Press Scan button
// 

// created a directory on your C drive named AmiBroker data backup
dayhours = paramtoggle("Day hours only", "No|Yes");
fmkdir("c:\\AmiBackup\\");
setbarsrequired(100000,100000);
lname = Name(); // gets the name of the symbol
// note: if you have names with invalid characters like / you must rename the file before you try to create a name 
// add an IF line for each symbol you need to rename
if (lname == "ER2U8-GLOBEX-FUT") lname = "ER2U8";

fh = fopen( "c:\\AmiBackup\\" + lname + ".csv", "w"); 
if( fh ) 
{ 
	if(interval() == inDaily OR interval() == inMonthly OR interval() == inweekly)
	{
		fputs( "Ticker,Date,Open,High,Low,Close,Volume \n", fh ); 
	   	for( i = 0; i < BarCount; i++ ) 
		{ 
 		  	y = Year(); 
 		  	m = Month(); 
		   	d = Day(); 
			fputs( Name() + "," , fh );
   		   	ds = StrFormat("%02.0f-%02.0f-%02.0f,", m[ i ], d[ i ], y[ i ] ); 
   	   		fputs( ds, fh ); 
      		qs = StrFormat("%.4f,%.4f,%.4f,%.4f,%.0f\n", O[ i ],H[ i ],L[ i ],C[ i ],V[ i ] ); 
      		fputs( qs, fh ); 
			if(i == 65500 or i == 130000 or i == 196500 or i == 262000)
			{
				fclose( fh ); 
				if(i == 65500  ) fh = fopen( "c:\\AmiBackup\\" + lname + " A.csv", "w"); 
				if(i == 130000 ) fh = fopen( "c:\\AmiBackup\\" + lname + " B.csv", "w"); 
				if(i == 196500 ) fh = fopen( "c:\\AmiBackup\\" + lname + " C.csv", "w"); 
				if(i == 262000 ) fh = fopen( "c:\\AmiBackup\\" + lname + " D.csv", "w"); 
			}
		}
	}
	else // intraday so add time field
	{
		fputs( "Ticker,Date,Time,Open,High,Low,Close,Volume \n", fh ); 
 	  	y = Year(); 
 	  	m = Month(); 
	   	d = Day(); 
	   	r = Hour();
	   	e = Minute();
	   	n = Second();
   
	   	for( i = 1; i < BarCount; i++ ) 
		{ 
			if (dayhours and lastvalue(timenum()) >= 92900 and lastvalue(timenum()) <= 161500)
			{ 
				fputs( Name() + "," , fh );
 		     	ds = StrFormat("%02.0f-%02.0f-%02.0f,", m[ i ], d[ i ], y[ i ] ); 
   			   	fputs( ds, fh ); 
 
  	    		ts = StrFormat("%02.0f:%02.0f:%02.0f,", r[ i ],e[ i ],n[ i ] ); 
  	    		fputs( ts, fh ); 

	 	     	qs = StrFormat("%.4f,%.4f,%.4f,%.4f,%.0f\n", O[ i ],H[ i ],L[ i ],C[ i ],V[ i ] ); 
		      	fputs( qs, fh ); 
			}
			else
			{ 
				fputs( Name() + "," , fh );
 		     	ds = StrFormat("%02.0f-%02.0f-%02.0f,", m[ i ], d[ i ], y[ i ] ); 
   			   	fputs( ds, fh ); 
 
  	    		ts = StrFormat("%02.0f:%02.0f:%02.0f,", r[ i ],e[ i ],n[ i ] ); 
  	    		fputs( ts, fh ); 

	 	     	qs = StrFormat("%.4f,%.4f,%.4f,%.4f,%.0f\n", O[ i ],H[ i ],L[ i ],C[ i ],V[ i ] ); 
		      	fputs( qs, fh ); 
			}
			if(i == 65500 or i == 130000 or i == 196500 or i == 262000)
			{
				fclose( fh ); 
				if(i == 65500  ) fh = fopen( "c:\\AmiBackup\\" + lname + " A.csv", "w"); 
				if(i == 130000 ) fh = fopen( "c:\\AmiBackup\\" + lname + " B.csv", "w"); 
				if(i == 196500 ) fh = fopen( "c:\\AmiBackup\\" + lname + " C.csv", "w"); 
				if(i == 262000 ) fh = fopen( "c:\\AmiBackup\\" + lname + " D.csv", "w"); 
			}
 	  	} 
	}
   	fclose( fh ); 
} 

Buy = 1;