This old discussion
Is going to be closed today.
Try what others have noted and be sure to include the items noted (other cable, PC and using the memory card or wireless/WiFi/Bluetooth for transfers.)
I'm encountering more and more PC and cable issues and rarely a phone issue. But that's here so that's what I'm seeing.
As this post nears it's 1 year old date, it's now closed. Start a new discussion to get the best results.