i have a 1st gen iphone unlocked, running 2.1. in cydia there's a storage tab. my system shows i'm using 82.1% with 17.9% free. some apps (like voice recorder, notes, etc) have a terrible and annoying lag to them. is it possible to free up system space so the phone in general runs faster? if so, how? can i free up space by deleting things like sources? if so, which ones? the only things i use from cydia are winterboard, bitesms, and scrobbled. thanks!