I've been mapping a lake I've been fishing lately that hasn't been mapped. Lake Santeetlah, NC. I'm getting some good maps using the PS30. It is really impressive how this transducer works with QuickDraw. So I decided to share this in the QuickDraw Community. Logged in, simple procedure to upload the mapping. File uploading thermometer goes right along and hangs toward the end. I tried it repeatedly and had the same problem every time. Hangs and doesn't complete no matter how long I wait. So I called Tech Support. Talked to Steve. He said that most likely my problem was my internet speed. Well I really didn't think that was it but I had an alternative. I can do Verizon HotSpot from my cell phone and connect to it. So I did that and whoosh, the file uploaded without a hitch. If you are doing QuickDraw Community, take that into account.