I bought a Sony Handycam DCR-DVD650 camcorder, and I bought an 8GB memory stick, which is in the camera, and according to the packaging material, I should get about 3 hours and 15 minutes of recording time. Then it told me that I had to insert a DVD-RW in order to record, which has 1.4 GB of space. The recording time says I only have 64 minutes and it's empty. Why do I only have 64 minutes instead of the 195 minutes I should have?