how to back up ami data?

Sometimes i saw amibroker crashed.then i lost my data.abar onek somoy bivinno csv file theke ami te data input kore total data pai.Amra ki ami broker er sob data ekta file e csv akare save korte pari na?
I have written an AFl which will help you to make back up of your amidata.
I have attached an afl.
1.At first run this afl.
2.Select all quotaion
3.select all symble
4.press explore

Then
5.press export and save the file giving a name.it will be your csv file of backup
Now come to the point how youwill use it in future?

1.click import wizard
2.pick the file and next
3.select the column as
column1(ticker),column2(MDY),column3(open),column4(high),column5(low),column6(close),column7(volume)
4.next
5.finish byclicking what you usually do

the afl should be as:



//This program is written to keep the back up of ami broker file.
//hope you will enjoy
//thank you......OPTIMIZER


Filter=1;
AddColumn(O,"Open");
AddColumn(H,"High");
AddColumn(L,"LOW");
AddColumn(C,"Close");
AddColumn(V,"Volume");