Free up Space?

Is there any large caches that take up all the phones memory? I havent really done much, maybe installed 5 programs, (which I dont know, is it work if it is installed to the internal storage, or does it have to be installed to the device?) maybe 6 pictures taken with the phones camera, and 3 songs downloaded from the music program, and now it says that I have 2 mbs left and it wont open youtube because it needs 8    

Can I install programs to the internal storage? or do those have to be on the device?

What programs do I need to save to the device?

The way I understand it is, any program you install will work if installed into the internal storage side of the phone. 

I've never tried that program you mentioned. 

Here is an advanced task manager that will allow you to monitor your processes... and you can also soft reset from the menu instead of taking the back cover off and pressing that button with the stylus:

http://www.touchxperience.com/en/advanced-task-manager/downloads.html

If you click the top right of your phone you will see a button that looks like a micro-chip of some sort.  Click that and it will show you your memory levels.  Also, you can use your Finder program that came with your phone to search for files by size.  It will show you what might be eating up storage space.