Originally Posted by demolutioner
Hi guys i recently bought a galaxy s3 and i'm trying to connect it with my PC to transfer songs apk's movies and etc.
You don't have to connect to the PC to transfer files to the S3. You could use a wireless solution such as Bluetooth (although most PCs don't have Bluetooth, some do) or AirDroid. I bought a Bluetooth adapter for my PC (great deal on eBay - 51 cents - works fine). Although I admit bulk moves are easier with a USB connection.
Your base question regarding transfer is probably better addressed at a forum specializing in Android devices. It is a question that is asked often (although not the missing sys file part).