Sorry however you'll have to be clearer about the actions which you are taking.
First, you should not need to copy packages, but instead install them and typically with aptitude.
As far as deleting files, there are a few ways depending on whether you're using a UI File Manager application or if you have a terminal or command line.
But bear in mind that simply copying packages from one place to another does not mean you have installed them and then are using them in your distribution.
Ubuntu has a software package manager in their UI desktop, but they also use
aptitude.
An MTP device is either a phone, a USB thumbstick, a CD/DVD or some other external storage medium. Once again you just delete from those using normal Linux delete commands or actions; however it appears you either do not understand this or you have more particular needs which you haven't described as yet.
A good thing to do is describe the exact actions you are following, cite any links which reference thing if you're following some sort of guide. The links provided describe Ubuntu packages, but that is all, they tell someone what's in the package and also allow you to download it.
With the Ubuntu Software Center or Aptitude you can install packages from the Internet without pre-downloading them. Or you can download the source and build the packages on your system. This is not always the correct choice for a normal Desktop Linux installation, you shouldn't have to build the packages if you're running them on a regular PC with the equivalent of an Intel processor.
Please post better descriptions of what you're trying to achieve as well as your system specifications so that people can aid you better.
You also seem to be posting multiple, but related questions in different threads. This is fine if you have multiple questions; however be aware that if you fire away a large number of identical questions, it will cause confusion. If you fire away a large number of different questions, however need to fulfill a specific baseline to get going first, it may be best to concentrate on one question at a time versus asking them all and then confusing several answers.
Linux answers may vary and there usually are several ways to accomplish what you want to do. Plus given the flexibility of Linux, there are a number of things you can do, but perhaps should not attempt unless you have greater experience or are very organized with your approach. Given that you've cited in other threads that you are a novice, my caution here is that you may confuse yourself by asking all your questions and then seeing the variety of answers and then be worse off than when you started. Recommend you identify a main first thing to accomplish, get working, and the move on to the next topic. You'll eventually understand it, don't worry.
