My android device tells me that i've 444 kb out of 301mb internal memory left. It's become glitchy and basically unusable. I'd looked on this forum before, so I decided to clear data and caches from my apps. I've found out that Package Installer uses 50mb of data (not cache - data), while most other apps don't use more that a couple of kb. The problem is, when i press "clear data", nothing happens. I get a prompt, asking me whether I'm sure, I say yes and nothing happens after that. Any help at all would be appreciated along with advice on how to prevent such situations in the future. If you need additional info, be sure to ask.