Thank you for your answers.
I had already checked that link, but I would need something more in depth to really understand that description. On another note, it is not even clicking noise - it makes like a louder noise and then if I check SMART I see calibration increase by 1. After that all seems ok... I was hoping someone would have some idea about this behavior.
Also, while in games it quite frequently makes a noise (different from the one above) but still audible with hdd led switch on - that noise has been present probably since I got the drive... I'm starting to think maybe those are normal noises... anyway I keep it under watch and should it fail I will take it to be replaced - it's only 3 months old with 2 year warranty - so it's probably too early to go have it replaced - why not wait a bit more and with a new one later extend the overall lifetime of 2 hdds together
P.S. I forgot - the maximum ever attained for the drive was 56 , but this summer it was around 50C, in a close to 30C environment temperature. Now it has dropped to around 44-46 . I did indeed have some overheating, but I cleaned the cooling vent outlet which was quite clogged with dust - computer runs much cooler now - my fan never went on high speed since cleaning it (set to go at 60C CPU temperature) - so CPU never goes over 60C even in gaming.