Of course it's around low terms usage of SSD, just don't think about it. SSD drive should bring the speed for your PC and, at any rate, to my mind you shouldn't worry at all about reading/writing/storing amounts. Just keep valuable data in one (better two) several reliable archival storage devices, for example your HDD and some USB or Optical storage and feel fine. I Have a 120Gb SSD cheapest possible smartdrive for over 6.7 months and a copy of main info on removable HDD, some extra valuable files have second copy on blu-rays and usb's. Don't bother yourself thinking about lifespan of your SSD. This unit just brings overall speed bonus to your sys, use it at full scale without any afterthouts and doubts. From my point of view swap file should be also on your SSD (instead of HDD according some advices), because you bought your SSD to boost your PC.