The more records the more slow adding rows

Question

Hi everybody, It's terrible how slow my DB Connection gets. I uses C# and an Access DB. I'm importing Data from files into the DB. e.g. I have 4 files the DB is empty it's very fast appr. 1 Minute. Next time, same files, only 2 files take 1 Minute it slows down double. Then at 2 files I abort, because that's boring. Next Time 1 file takes 1Minute and so on, until you wait and wait. What's the problem here ? I tried to put away all the indices (only at the Primary Key there was one), but nothing, please help. Thanks ! Greetings, Nick