what do i do when i have "insuffiecent storage" but alot of SD card space

boss 17

Estimable
Jan 17, 2015
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4,510
I hav an Android optimus exceed 2 and my phone keeps saying "insuffiecent memory" and i have 1.5G of free SD card space and 147mb of internal storage but it won't let me dowload an app that would only take 16mb of space