As UPF members or researchers, you own a free academic plan on Bitbucket. That means that you have unlimited storage for being part of UPF. To use the academic plan, you need to create an account using your educational email account e.g. [email protected]
You can create your Bitbucket account here: Bitbucket
Now you that you have created your account, you should have activated your academic plan. Nevertheless, there is the possibility that your account has not been set as academic. If that is your case, you need to fill this form in order to get the academic plan.
If you don't know if you are using an academic plan, click on the user button on the bottom-left corner of the screen and choose Bitbucket settings.
After that, click on plan details on the list to your left. Here you can check which plan are you on and what are the existent plans.