The only problem was in getting it to format to fat32 so that I could use it in myexcellent Sansa Clip+. I actually had to do a low level format and then reformat itto fat32 with  third party programs. It comes natively formatted to ex fat which many devices don't read (windows only formats fat32 to 32GB ). It's easy to format it to NTFS but either buy nothing bigger than 32GB or search the internet for programs and methods to reformat it if you need fat32 and you have the skill and time.Otherwise its good stuff but Scan-disk should provide a reformat program on their website imho?