I know this thread is about 8 months old but I found it searching for a solution to the not recognized problem. Well I didn’t find an answer here, but it did point my in the right direction and I found a solution for those who don’t have any of the “conflicting” software mentioned in the above posts. All you have to do is assign it a drive letter. Go to control panel - admin tools - comp management - storage - disk management. Find the sandisk, right click on it and assign a drive letter to it. Should be recognized instantly. Hope this helps those peeps still having problems,