When I have let more recent phones (JellyBean or newer) phones get under 1GB of free space, I have had all sorts of strange issues... can't install apps, sluggish operation, and other misc "unusual" issues. I highly recommend CoMoNexus's recommendations, plus clear out your cache space, you can find apps in the Play Store to do app's caches, but for real cleaning you need to clear the cache and dalvik cache and reboot from the bootloader. Plus, when you are talking a 8GB phone like this one, I would recommend using cloud storage as much as possible and keeping the device as clean as possible, never know when you might want to snap a few dozen or more pics which could fill the phone very quickly, better to keep space open then to scramble in a situation where you need it.