Currently an Evernote account is limited to 100,000 total notes. This is true regardless of if you use the Personal or Professional plan. I have been an Evernote user since 11/2008 and I just hit the 100,000 note limit. I was told in a support chat with Evernote that there was not option available for me to add more notes to my existing account without deleting notes. So I recognize that I have A LOT of notes, but I use Evernote for SO many things! I really like Evernote, and I would be willing to pay for a service to allow me to add more than 100,000 notes. Until then I will delete some notes, and I'll probably start looking at possible replacements for Evernote sadly. So please consider this feature addition Evernote. I would be extremely grateful.