However, when it begins to copy files over, it'll copy a few files over, and then it will say that the attached device is not functioning. adb devices then says the device is offline. I have to unplug the phone and plug it back in to get it to be online again.
I get the same problem with the adb pull command.
I don't know what's wrong. I updated my USB driver to the latest (rev 10) and it is correctly showing ADB Composite Device in my Device Manager. I'm currently on a rooted Android 4.4.4.
If anyone knows how to fix this please let me know.