如何使用phpMyAdmin将数据库的内容导入新数据库？

Inside my MySQL databases there are 15 tables. Each table currently contains nothing inside, here are the tables.

Now I have a folder on my PC which contains 15 files with the same name, as shown here.

Inside the file, I have this line at the top so It should import it into the already existing database if I'm correct.

DROP TABLE IF EXISTS inventories;

However when I do import it, I always get errors. Here is the error I get when I try to import the inventories file from my PC to the new database.

I don't know how to fix this. I'm very new to SQL as well.