HI TOM I HAVE A 17 GB FOLDER OF PHOTOS I USE AS A PRESENTATION FOR MY DESKTOP , I HAVE IT SET TO CHANGE IMAGE EACH 30 SECONDS ... IM WORRIED IF USING THIS SETTING WILL SHORTEN THE LIFESPAN OF MY HARD DISK
No it shouldn't is it a HDD or a SDD? If its a hard drive then there is no need to worry since they last forever anyways. SSD have a certain number of read/write cycles however.