Hello. Locally, I can only buy a Note with 16GB RAM. There is no 32GB version. My questions are: - The memory cards are divided into classes. What class would be fast enough? Do I need to choose Class 10 memory? I plan to use the device to take HD videos sometimes. - Somebody mentioned that it is better to get the 32GB version than the 16GB with 16GB external memory. The reason is that even Class 10 memory cards are slow compared with the internal memory. In real world use, is the speed difference noticeable? For example, if you play back a HD video stored in a memory card, do you see a lag? If you take HD video, will the device be able to record everything if it is instructed to store the video in the external memory? - At Samsung showroom, the staff said that the maximum allowable memory is 16GB+32GB. I asked if the limitation of 48GB is due to the OS, the device or the availability of larger capacity memory card. The staff said that it is due to the device. He said that if I insert a memory card of higher capacity than 32GB, I can still use only 48GB. Somebody on the net said that in real world test, the maximum allowable memory size is determined by the availability of larger external memory card. So, if a X GB memory card were available, than the device would be able to handle 16+X GB. Any experience? Thanks.