Hello,
The way you're asking, I guess you don't intend to develop applications for your device or try to go under the surface of the Android OS, so you don't need the USB debugging.
If you just want to exchange data between your PC and your phone, it depends on what OS you are using on the PC.
- If you are using Linux, the chances are high that you don't need additional drivers.
- If you're using Windows, than you will probably need additional drivers. When you install the Samsung Kies tool, then you get the drivers installed. If you don't like to install Kies, than you can also find the drivers only somewhere on the Samsung support pages.
When prepared such way, than you can connect your phone and PC with the USB cable.
On your phone you will see a screen, if USB debugging is activated, where you should uncheck the USB debugging.
Next you get to a screen (with the green android character) where you are asked if you want to give the attached PC access to your phone's SD card. Here you should click on the white text box on the bottom, as it is also explained on the same screen.
On the next screen the android character is now yellow.
The PC now should show the external storage, as it would also show an USB memory stick.
You can copy data either with help of Kies or as you would exchange data with an USB memory stick.
Before unconnecting PC and phone physically you have to unconnect them on the software level. Therefore you first choose to unmount the device in the OS of your PC. Windows would call it something like 'remove safely'.
Then you also have tell your phone, that you are done by clicking on the white disconnect box on the yellow character screen.
You will get back on the green character screen and you can either disconnect the cable, or connect again to your PC if you forget to copy some files.
(If you just want to charge your phone with help of a PC, e.g. at the office or a friend's home, then you don't have to give access to your SD card, since you may want to keep your SD card content private. In that case you also have to make sure, that USB debugging is deactivated on your phone, otherwise your phone is even more exposed.
As far as I remember, the connecting procedure is also described quite good in the manual, that can be downloaded from the Samsung's web site. At least if you follow the proposed way by using Kies.
... as always -> Read the manual first! <-