Hi, I borrowed a sandisk usb storage (what ever it is called) from my husband. It has some files saved in it. It was working fine, I had copied and pasted some pictures and videos from my laptop to this mini device. Suddenly, there was an error saying that the transfer is not complete so I clicked okay. I checked on it and there are some pictures that were transferred successfully, although not all of them. Anyways, when I used it to the other laptop where I am planning to work on the pictures, I can not open it anymore, saying that I needed to format it before I can use it. I thought maybe it was just my laptop so i went back to the other laptop where i originally took the files from and it says the same thing. Now I can not open it or view files whatsoever...and it is not mine...hellppppp, what could have i done wrong, how can i recover those files. thank you for your help