Folks, Please be very careful of the deals on groupon. Most are fake and not to be trusted.Take there 512GB pen drive by zdata for example. These pen drives are fake, they will report 512GB space on windows but you would end up loosing all your precious data after a couple of gb’s of writing into them. Please read the article by ebay on this below:
https://ebay.com/gds/All-About-Fake-Flash-Drives-2013-/10000000177553258/g.html
It is shameful that groupon is involved in such petty crime and I felt it was necessary to report this wherever I could.