I've been attempting to reduce the amount of file storage I use on Yahoo! Mail...I find that it takes hours to reduce the number of old emails by a few hundred:
1. I'm only able to select 100 emails for deletion at a time (the "select all" button does not work)
2. Once deleted, the emails still occupy file storage space in the trash
3. Once again, I'm only able to select 100 trash emails at a time for permanent deletion (the "select all" button does not work)
4. Once I select and request permanent deletion, I have to also confirm that choice by responding to another pop-up

I don't want to believe this is a cash grab by Yahoo, hoping Mail users give up and buy a premium account. It's not, right?