System memory is the samething as internal storage correct.when I go to settings and then storage inside of internal storage there's make more space,clear caches,only rarely used apps and all apps.then there's sd card which gives you make more space and unmount sd card.If I wanted to clear,clean off my entire sd card from in here Would I just hit make more space?and at all times for your phones performance should you always have a certain amount of freef up space in your phones system memory/internal storage if yes what should you have only half of your phones system memory filled up at any given time or less?when should you check mark the sd card encryption?and your storage is your sd card that's in your phone.Does it matter with that how much of that is filled up for performance reasons?could you explain these qwestions. 
Sent from my HTC Sensation 4G using XDA
Sent from my HTC Sensation 4G using XDA
