Bring Back Google Drive Option
Yahoo used to have a drop-down arrow feature when the attachment button was pushed. This feature allowed users to attach bigger files by way of Google Drive (or other sites with larger file attachment capabilities). As a grad student and a teacher, it has become extremely annoying and an utter hassle now, trying to use yahoo to attach bigger files, PPTs, etc. as a means of working with classmates and colleagues.
As much as I like yahoo, I have had to resort to using other emailing sites that do allow larger files to be attached, in order to get projects done faster and more efficiently; it costs more time (and explanation of content at times) sending 1 file at a time using yahoo. Yahoo used to be my primary means of sending big files and emailing, but I have started to use it less and less when it comes to work and school—if this issue is not fixed soon, I will be using services such as Gmail more, that provide the features I need to make school and work easier.
I seriously do not understand why the Google Drive option was ever taken away. If yahoo does not want to use Google Drive because it is another company, fine—but make sure to create a version of a drive for yahoo, to give people an option for easier attachment with larger files. Otherwise, you're forcing users to use other emailing services.