InnoDB is a Database Engine for MySQL providing a lot of functionality to service. 

InnoDB stores table structures and datas in different files in storage in default with an option to disable and store in a single file.

Overall structure is:

tablename.ibd stores data of table
tablename.frm contains structure and definitions

If you are looking for consultation, fill the Contact Form below.

Know thyself, know thy enemy. A thousand battles, a thousand victories. Sun Tzu