Here's how Dropbox is changing its free tier with a major update

Dropbox made some major changes to its free tier on Wednesday, including support for read-only folders, as the company released a crush of new features aimed at enhancing its users' productivity. 
The biggest change users will notice: In order to automatically upload photos from their smartphones, they must install the Dropbox app on at least one Mac or PC. People who don't mind manually uploading their photos to Dropbox won't need to change anything.
Dropbox won't say how many p