gazumped

Can you help me out with a quick issue? 

I had an original EN account that I maxed out with 100,000 notes and then I have my current EN account. 

I synced my original EN account (the maxed-out one) to a certain folder on my D drive. 

1: Are there supposed to be only three folders in the folder? "Crashes," "Databases," and "Logs?"

2: It's obvious that the e[myname].exb file contains all the actual data, since it's many, many GB of data and every other file is tiny. Why is everything packed into that one file? What is the purpose of that? 

3: How do I know that all 100,000 notes are in that file? (I can't count the notes to double-check, since they are all compressed into that single .exb file.) 

Thank you so much!