04-19-2018 04:22 AM
Let me add an extra information regarding my case.
When I did accepted the 30 Gb offer by signing in, I received an email from dropbox because I had logged in in a new machine. The email said:
You've connected a new app, 'Lenovo Welcome', to your Dropbox.
Later I couldn't find this Lenovo Welcome anywhere on my lenovo's device. I did updated the BIOS right after that (had a notification from Lenovo Vantage (or something similar) saying there was a new BIOS and that I should update it).