[UncleZen]

Lumia 520. Windows Phone 8.1.
Changed my SD card from 8GB to 32GB and now.
Gmail does not connect.
Cortana says there are no interests available.

So, I deleted my Gmail account, but now I cannot add a new one.
Setting > Email & Accounts > Add account > Google > Connect
Just tries to connect but does nothing no error nothing.

Cortana says interests are not available
AFAIK my Microsoft account is working correctly, but I have no idea how to prove it.

I have no idea how to get this to work anymore.

[UncleZen]

Well, I seem to have fixed it, but I have no idea why or how its fixed.
I had already deleted the Gmail account.
I used: Setting > Email & Accounts > Add account > Advanced > added some settings
This didnt work, but when I deleted this account, and re-tried:
Setting > Email & Accounts > Add account > Google > Connect
It worked and furthermore Cortana burst into life.
Go figure.

[RumoredNow]

Both those issues are about connectivity with the internet.

An SD card should have no effect on that.