Insufficient storage error even after partition upgrade for FP1

[therob]

For sake of completeness, here is the wiki-Post for this topic, which I edited after having the same problem and luckily could solve it with the solution of @FFFan (Link2SD):

How to solve a "insufficient storage" error on your FP

This is a Wiki Post. Everybody can edit it. Continuing the discussion from Insufficient storage error even after partition upgrade for FP1: I’m creating a new topic for people who are affected by the infamous "insufficient storage" problem explicitly persisting AFTER the unified storage upgrade. I guess there is more than one solution to the problem, so feel free to give your own solution in this wiki. (Use the “Edit” button in the top right of this post.) Error log: (happend to @therob, 19.1…