Is the E60 storage space insufficient? No

I want to install a 3D billiards game to E60 tonight, but I am prompted "insufficient storage space ". I am surprised that software, games, and audio and video are usually installed on the memory card (Elastic Block Storage), and less than half of the space is used for 1 GB of cards. Oh, maybe the disk C is out of space, right? Use y-browser to check whether there is less than 1 MB of space. After studying for half a day, I found that the theme file occupies too much space. Considering the impact on the system running efficiency, I always install the theme on the C drive. OK. After deleting a bunch of theme that are basically not used, nearly 30 mb of space is reserved for drive C. Oh. By the way, I usually use a pure black theme, and I feel very good, but there are some small flaws in the color of some places (the text color is as dark as the background, and nothing can be seen, for example, Java form; also, notepad text color and background color are close to white, it is difficult to see the text), but in general it is good, haha.