To me the product was defective or all the corresponding audio recording products have a problem... In use, it is easy, like a USB flash drive. You connect it to the computer and listen to the recordings. The problem is located in the duration and generally in the recording. I wanted to record for 6 hours and it recorded only 3 hours and something, then the recording stopped on its own. Another time I tried it, it recorded only the first 10 minutes or so and then nothing. Overall, it has issues... For short recordings, for example 2 hours, I haven't tried it, maybe it will work (the recording was always done without previous files inside, for maximum capacity). Overall, I am not satisfied, now I use it as a USB flash drive