thank you for quick reply, but i am still confused. when i click export i got 26 line electrum-private-keys.csv which contains "address, private key" like this (testing it so does not matter if this goes public):
address,private_key
1Cks4gBx5VsNJnzHUAPS8oVxRHeL795Wvq,KxCCniJif99E594mgomqrguc1ZUfDL5UbzXbanfWr732eGgHU6y4
13woCaMcUGhZZzU6SYsgYo7xDHvwxQAp7b,KydEuvT5qndyuk8Q1tYoeEoQqwfVQZqBULKiqqGgThUi1Ba5YUEm
and so on
it looks like electrum private keys for 26 bitcoin address. what is the use of rest of 25 address?